Increase Vaccination Rates Research Articles

Motivation, Cues to Action, and Barriers to COVID-19 Vaccine Uptake: A Qualitative Application of the Health Belief Model among Women in Rural Zambia.

Vaccine hesitancy has played a major role in slowing the global COVID-19 response. Using cross-sectional, primarily qualitative data collected in four rural districts in Zambia, we aimed to explore community perceptions of COVID-19 disease and vaccines, including perceived motivators, cues to action, benefits, and barriers to vaccine uptake as guided by the Health Belief Model. In-depth interviews (IDIs) were conducted in late 2021 with women of reproductive age who were enrolled in an early childhood development study. Although two-thirds of the 106 respondents reported low perceived risk of catching COVID-19, they expressed concern that the COVID-19 pandemic had impacted their daily lives and feared effects of the disease. They had generally positive beliefs that the vaccine would be accepted among their communities when it became more widely available. Reported motivators to vaccine uptake included desire for protection against COVID-19 and understanding vaccine purpose, due to ongoing education from health personnel, neighbors, friends, radio, and church leaders. Misinformation or reported bad experiences served as cues away from vaccine uptake. Examples of misinformation included the vaccine causing COVID-19 or another disease and death and vaccines being associated with the devil and against Christian beliefs. Accounts of pain after receiving the vaccine also discouraged uptake. Perceived benefits included a desire to be protected from the disease, belief in the effectiveness of the vaccine, fear of catching COVID-19, and belief the vaccine would limit negative effects. Health system implementers and policy makers should consider recipient motivators and cues to action to further increase vaccination rates.

Hospital costs of COVID-19, post-COVID-19 condition and other viral pneumonias: a cost comparison analysis.

To compare hospital admission costs for coronavirus disease 2019 (COVID-19) cases to hospital admission costs for other viral pneumonia cases in Australia, and to describe hospital admission costs for post-COVID-19 condition. A cost comparison analysis of hospital admissions due to COVID-19 or other viral pneumonias between 1 January 2020 and 30 June 2021 at Victorian public health acute and subacute services. Demographic characteristics, clinical outcomes (including diagnoses, impairment, subacute admission, intensive care unit admissions, ventilation, and length of stay) and cost data (including diagnostic-related groups, and total, direct and indirect costs). During the study period, 3197 patients were admitted to hospital due to COVID-19 and 15 761 were admitted for other viral pneumonias. Admissions for COVID-19 cost 29% more than admissions for other viral pneumonias. Admissions for COVID-19 requiring intensive care unit admission incurred significantly higher mean costs (A$120 504 or US$90 595) compared with those not requiring intensive care unit admission (A$19 634 or US$14 761). The adjusted cost of admissions related to post-COVID-19 condition was A$11 090 or US$8 337, and these admissions were significantly more likely to be elective. Direct costs accounted for most of the costs for all groups, and admissions for post-COVID-19 condition used less allied health services than other groups. Given its recent emergence, cases of acute COVID-19 and post-COVID-19 condition have had a significant additional financial impact on Australian hospitals. Further studies are required to understand long term costs and identify trends over time in the context of increased vaccination rates and subsequent variants of severe acute respiratory syndrome coronavirus 2.

Interventions involving nudge theory for COVID-19 vaccination: A systematic review and meta-analysis.

New approaches to mitigate vaccine hesitancy and improve vaccine uptake are urgently needed. Nudging has shown effective results in several health areas. However, the effectiveness of interventions involving nudge theory in increasing COVID-19 vaccination remains unclear. We searched PubMed, Web of Science, and Scopus for randomized controlled trials published before December 31, 2022, to determine whether interventions involving nudge theory improved COVID-19 vaccination behavior and intent. Risk ratio (RR) and a 95% confidence interval (CI) were used as pooled measures to assess vaccination behavior. Intention to vaccinate was reported in a narrative synthesis. Sixteen randomized controlled trials involving 176,125 participants were included. Interventions involving nudge theory weakly boosted the COVID-19 vaccine uptake rate (RR = 1.21, 95% CI [1.07, 1.36], p < .01). Subgroup analysis showed a weak positive effect of social norms (RR = 2.04, 95% CI [1.61, 2.57]), defaults (RR = 1.32, 95% CI [1.03, 1.69]), and salient reminders (RR = 1.19, 95% CI [1.04, 1.36]). Nudge interventions integrating multiple components were more efficacious in increasing vaccination rates compared to nudge alone. The effect of nudging interventions weakened over time (p < .001). Most studies (10 of 11) involving vaccination intention outcomes showed positive or partially positive results. Interventions involving nudge theory can promote COVID-19 vaccination behavior and intentions. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

Leveraging Social Marketing to Increase Vaccination Rates: A Systematic Review

Abstract Introduction Vaccinations are crucial for protecting individuals from preventable diseases, serving as a cornerstone of public health, safeguarding entire populations. Low vaccination rates can have devastating consequences, leading to outbreaks of preventable diseases. Social marketing has had an increasing role to play in public health. This systematic review seeks to investigate social marketing effectiveness in boosting vaccination adherence. Methods A literature search was conducted in PubMed, Scopus and Cochrane Library, using keywords “social marketing”, ‘campaigns”, “vaccination”, “vaccination uptake”. The search was limited to English-language studies, including studies discussing social marketing campaigns and its impact on vaccination uptake. Prior to inclusion, the studies were evaluated for relevance and applicability to the research question. Included studies were analysed for methodology, sample size, data collection methods, and key findings. Results Of 198 articles identified, 26 studies met inclusion criteria. All studies reported demonstrable improvement in vaccination adherence and hence higher vaccination rates with the use of social marketing campaigns. Targeted messaging on social media allows communication to be tailored to specific demographics and address their unique concerns. Community engagement combats vaccine hesitancy by dismantling misinformation and rebuilding trust. Additionally, these campaigns leverage social influence and mobilise communities to cultivate pro-vaccine attitudes. By addressing personal choice, knowledge gaps, and hesitancy, social marketing paves the way for greater vaccination uptake. Conclusions Social marketing has been proven to be an effective tool in promoting vaccination adherence in public health. As vaccination remains a critical aspect of public health, the continued use of social marketing interventions is essential for improving vaccination rates and ultimately enhancing overall population health. Key messages • Social marketing campaigns lead to higher vaccination rates across various populations. • By addressing vaccine hesitancy, social marketing paves the way for increased vaccination uptake.

A chatbot informed by behavioural science increases vaccination rates more than a simple reminder.

A chatbot informed by behavioural science increases vaccination rates more than a simple reminder.

A behaviourally informed chatbot increases vaccination rates in Argentina more than a one-way reminder.

Maintaining COVID-19 vaccine demand was key to ending the global health emergency. To help do this, many governments used chatbots that provided personalized information guiding people on where, when and how to get vaccinated. We designed and tested a WhatsApp chatbot to understand whether two-way interactive messaging incorporating behaviourally informed functionalities could perform better than one-way message reminders. We ran a large-scale preregistered randomized controlled trial with 249,705 participants in Argentina, measuring vaccinations using Ministry of Health records. The behaviourally informed chatbot more than tripled COVID-19 vaccine uptake compared with the control group (a 1.6 percentage point increase (95% confidence interval, (1.36 pp, 1.77 pp)) and nearly doubled uptake compared with the one-way message reminder (a 1 percentage point increase (95% confidence interval, (0.83 pp, 1.17 pp)). Communications tools designed with behaviourally informed functionalities that simplify the vaccine user journey can increase vaccination more than traditional message reminders and may have applications to other health behaviours.

Modeling the impact of screening awareness and vaccination on human papilloma virus transmission

In this work, a two‐sex deterministic model for human papillomavirus (HPV) is developed to assess the impact of screening awareness and vaccination on the transmission dynamics. We provide a detailed analysis of the HPV model and established results for boundedness of the solutions and existence of a positively invariant and attracting set. The basic reproduction number is characterized, and it is shown that the disease‐free equilibrium is locally asymptotically stable if and the system is uniformly persistent if . Sensitivity analysis of reveals that HPV vaccination can mitigate HPV transmission, and HPV vaccination along with screening can further reduce the spread of HPV infection. Numerical simulations showed that the public awareness of screening after being vaccinated is contributing to reduce the spread of epidemic, and the role of screening awareness in controlling the disease was significantly greater among men than women. Besides, the numerical simulations reveal that increasing vaccination rates for male is effective in controlling HPV transmission. Hence, it is necessary to enhance the screening for men. Moreover, increasing vaccination rates is more effective than increasing screening awareness in eliminating the epidemic.

Out of focus but still relevant? Influenza-related resource utilization and vaccination coverage gaps in adults below 60 years of age with underlying conditions: an analysis of 2016–2024 real-world data in Germany

Background In 2003, the WHO aimed for a 75% or higher influenza vaccination rate among at-risk populations. However, this target was achieved in a few groups during selected seasons in some European countries, and never in Germany. Adults with underlying conditions (UCs) are a critical negleted group for influenza vaccination. This study aimed to identify data gaps in influenza burden and vaccination coverage among adults under 60 with UCs in Germany and bridge these gaps using real-world data. Material and methods We conducted systematic research and analyses using German administrative and claims databases from June 2016 to April 2024. We report on epidemiology, direct care costs, indirect costs from work incapacity, vaccination coverage rates, and describe data gaps. Results Influenza data for high-risk populations are limited. Comprehensive data on influenza epidemiology and vaccination coverage rates (VCR) is available, though with a delay in data availability. Before and after the pandemic, individuals aged 50-59 had the highest rates of influenza-related hospitalization and ICU admission compared to younger age groups. Across all age groups and seasons, individuals with UC experienced higher rates of medically attended influenza cases, hospitalizations, and healthcare costs, with those aged 35–59 being particularly vulnerable. Vaccine coverage was higher in adults aged 35–59 compared to those aged 18–24, and in females compared to males. Limitations Discrepancies of vaccination status, limited data availability, and variations among the extent of UCs. Conclusion In Germany, recent policy measures have mainly targeted those aged 60 and above. While this elderly population experiences the highest disease-related impact, influenza can also lead to substantial healthcare resource utilization (HCRU) and costs in younger populations with chronic UCs; Facilitating vaccination access for this group, such as through pharmacies, is essential. Definition of quantifiable vaccination targets and measures to increase vaccination rates based on these targets are required.

Optimizing influenza vaccination among oncology patients through quality improvement cycles.

285 Background: Influenza poses significant risks to cancer patients, who are especially vulnerable due to immunosuppression caused by both their disease and treatment. (Cooksley et al., 2005) Sidney Kimmel Cancer Center – Jefferson Health (SKCC)’s Quality Improvement (QI) initiative aimed to increase influenza vaccination rates among adult cancer patients in our Center City clinic from October 2023 to March 2024. At baseline in the 2022-2023 flu season, 49% of our patients had a documented vaccination against influenza, leaving most of our patient population at increased risk for influenza infection. Methods: A series of four Plan-Do-Study-Act (PDSA) cycles were implemented over the course of the vaccination season. Cycle 1 collected baseline data on vaccination status via electronic health records (EHRs) and identified gaps in patient knowledge and vaccine hesitancy. Cycle 2 trained medical assistants (MAs) to engage in effective vaccination conversations, emphasizing the use of presumptive communication techniques and the reconciliation of immunization records in EHRs. Cycle 3 integrated patient education materials on vaccination in the clinical encounter. Cycle 4 scaled assessment protocols across teams. Results: Cumulatively, 68% (2,592/3,824) of unique oncology patients had a documented influenza vaccination by the completion of the season in March 2024. Integration of vaccine reconciliation into the MA workflow was the iteration that led to the biggest increase in vaccination rate among the PDSA cycles tested. We surpassed our initial aim for the season (59%) in this metric. Conclusions: The QI project at SKCC demonstrates that layered strategies involving both patients and care teams can improve vaccination rates among adult cancer patients. Integration of vaccine assessment into clinic workflows was an effective tactic. Future efforts will focus on replicating these successes with other vaccines. Rates of influenza vaccination by PDSA cycle. Cycle # Date Cycle Description Outcome Metric: Cumulative Vaccination Rate (%) 1 Oct 2023 Provider perception survey of vaccination knowledge 65 2 Nov 2023 Integration of vaccine reconciliation in MA workflow 69 3 Dec 2023 Integration of patient education materials to clinical encounter 70 4 Jan 2024 – Mar 2024 Scaling of updated workflows to entire clinic 68

COVID Stress Factors, Willingness to be Vaccinated, and Reasons for Vaccination Hesitancy Amongst Youth and Ethnic Minorities: A Structural Equation Modeling Analysis

COVID-19 has caused psychological trauma. However, it is unclear whether these stresses are comparable across ethnicities, across age groups, and vaccination hesitancy. Moreover, the relationship between the different types of stresses and their relationship to vaccination hesitancy has not been studied. Using rigorous statistical methodology (structural equation modeling), we examined the measurement invariance of five COVID stress factors: danger of contamination, socioeconomic consequences, xenophobia, traumatic stress, compulsive checking, by ethnicity and age, and investigated their relationship to vaccination hesitancy, ethnicity, age, and expectations of contracting COVID using structural equation models on a UK sample. The instrument showed measurement invariance both with respect to ethnicity and vaccination hesitancy. Subjects with more stress and worry about contracting COVID had no more enthusiasm for getting vaccinated than the less stressed. Ethnic minorities were less stressed despite suffering higher morbidity and mortality. As age increases, so does the hesitancy to be vaccinated despite younger subjects reporting more compulsive checking. Vaccination hesitancy was related to fear of side effects and safety concerns. Public health campaigns should target younger populations to address their fears about and stress due to compulsive checking for COVID-19. These campaigns should also be designed to reduce vaccination hesitancy to increase vaccination rates, decrease active and passive carriers of the virus, and ultimately attain herd immunity.

Improving vaccination counseling rates in first time patients with cancer: A multi-disciplinary approach.

315 Background: ASCO guidelines 2024 recommend that “clinicians determine vaccination status and ensure that adults newly diagnosed with cancer about to initiate treatment are up to date on seasonal vaccines as well as age- and risk-based vaccines.” Prior to the study, Baylor Scott and White Hematology Oncology Round Rock (BSWHRR) clinic lacked a formalized process for vaccine education. The primary aim of this study was to increase vaccination counseling for first-time cancer patients with solid tumors or hematologic malignancies. The secondary endpoint was to optimize vaccination status for this group of patients. Methods: Inclusion criteria were patients 18 years or older with initial diagnosis of solid tumor or hematologic malignancy, receiving chemotherapy and/or immunotherapy for the first time, and treated within BSWHRR. Exclusion criteria were patients with subsequent malignancy, malignancy requiring second line chemotherapy and/or immunotherapy, or deceased. Patients meeting these criteria n=57 were collected during the pre-intervention period October 15-December 15. Post-intervention data n=52 was collected 6 weeks following the initiation of the intervention from February 18 – April 18. The intervention included a 2-sided handout containing current recommendations for vaccination schedules in immunocompromised adults. These handouts were provided along with counseling at 2 separate encounters (during the initial consult and during chemotherapy education). The handout included instructions for scheduling vaccines with the Baylor Scott and White Pharmacy and/or their PCP. This multi-disciplinary approach included nurse navigators, triage nurses, pharmacists, and physicians. A standardized documentation process was initiated and utilized for both consult and chemotherapy education encounters. Results: Following the introduction of vaccine education handouts and standardized documentation, vaccine counseling rates during the consult visit improved from 0% to 49%. Vaccine counseling rates during chemotherapy education visits increased from 0% to 71%. Overall, the number of patients that attended and were counseled during at least one of these visits increased from 0% to 70%. The secondary endpoint of increasing vaccination rates showed that non-seasonal vaccination rates improved. Pneumococcal vaccination rates improved from 33% to 42%, a 27% increase. Shingles coverage improved from 16% to 25%, a 56% increase. Conclusions: This study showed that a multidisciplinary approach, utilization of patient/physician education handouts, and standardization of documentation was effective in achieving a substantial increase in vaccination counseling rates for patients with newly diagnosed malignancy. The intervention was also effective in achieving the secondary endpoint of increasing pneumococcal and shingles vaccinations.

Influence of vaccination on COVID-19 reproduction rate: Time trends and persistence analysis

This paper aims to study how the increase in vaccination rate in Israel affect to the behavior of COVID-19 reproduction rate, from 19 December 2020, to 25 April 2021. Multiple advanced econometrics methodologies are used to analyze the degree of persistence, to understand the relationship between these two times series and the long-term behavior. The results of our study indicate that the vaccinations cause long-run effects to COVID-19 reproduction rate and the vaccination provides useful information to predict the COVID-19 reproduction rate. Also, we determine whatever exogenous shocks related with the virus reproduction will have a very short impact over time. The first change in trend occurs on 13 January 2021, with 24.37% of the population vaccinated and when it can be seen that the increased rate of vaccinations causes the infection rate to decrease.

The impact of COVID-19 vaccination rate on traffic recovery

At the beginning of the COVID-19 pandemic in the US, traffic sharply fell due to social distancing policies in many locations. Correspondingly, many regions observed an increase in traffic volume (traffic recovery) as the pandemic eased in 2022. We examine how vaccination rates influence traffic recovery in Los Angeles County (LAC), controlling for differences in case counts, demographics, and socioeconomic factors across areas with different vaccination rates. We use arterial road sensor data as a proxy for the traffic volume within each ZIP code, alongside their respective demographic and socioeconomic characteristics. We find that a higher vaccination rate is statistically significantly associated with a larger traffic recovery, a finding that remains consistent across all explored models. This implies that an increased vaccination rate could reduce the public’s perception of the risks of disease infection, leading to a larger traffic recovery. Moreover, we found that variables including population, income, race, work industry, and commuting preferences were correlated with vaccination rates. This highlights potential inequalities based on race, income, and industry sectors in the COVID-19 vaccination and a return to normal traffic flow.

Empowering pharmacy technicians as vaccine champions: A pilot study in independent community pharmacies

BackgroundIncreasing vaccine uptake in communities has been essential, even before coronavirus disease 2019. The use of "vaccine champions" or "VaxChamps" has shown promise. VaxChamps, who are often community members with specialized training but no special credentials, advocate for vaccination by sharing their experiences and knowledge. Pharmacy technicians’ scope of practice, coupled with their frequent interactions with pharmacy patients, make them ideal vaccine champions and a natural fit for the VaxChamp program. This study assessed the implementation and impact of the VaxChamp program in North Dakota community pharmacies. ObjectivesTo describe the development and implementation of the VaxChamp program in community pharmacies and evaluate its effect on vaccination rates and vaccine-related tasks within each pharmacy’s organizational context. MethodsThe VaxChamp program involved training one technician per participating pharmacy to spend 5 hours per week on vaccine-related tasks. Data collection included pre-post surveys, monthly reports, and semi-structured interviews with VaxChamps and pharmacists-in-charge from 6 pharmacies. Quantitative data were analyzed using descriptive statistics, while qualitative data were analyzed using inductive methods to identify key themes. ResultsThe 6 participating pharmacies varied in location and staffing. Most had prior vaccine administration experience. VaxChamps’ roles ranged from administrative tasks to direct vaccine administration, depending on the pharmacy’s staffing and workflow. Vaccination rates for pneumococcal and hepatitis B vaccines increased in several pharmacies, while shingles vaccination rates declined. The presence of advanced pharmacy practice experience students often influenced VaxChamps’ responsibilities, underscoring the need for clear role delineation. ConclusionIntegrating pharmacy technicians as VaxChamps in community pharmacies is a promising strategy to increase vaccination rates and enhance public health. Future research should explore ways to better integrate technicians into comprehensive immunization strategies and address the contextual factors that influence program implementation.

Analysis of health claims data on vaccination coverage in older adults in Bavaria, Germany: Influenza, pneumococcus and herpes zoster

BackgroundVaccination is essential, especially in older adults whose immune system function declines with age. The COVID-19 pandemic and its associated lockdowns temporarily disrupted routine vaccination services. We aimed to assess vaccination coverage for Influenza, Pneumococcus, and Herpes zoster among older adults in Bavaria over time and investigate potential pandemic effects on these rates. MethodsBased on health claims data from the Bavarian Association of Statutory Health Insurance Physicians (KVB), we estimated the percentage of adults aged 60 years and older vaccinated following the German Standing Committee on Vaccinations (STIKO) recommendation for Influenza (2012−2021), Pneumococcus (2017–2021) and Herpes zoster (2019–2021), stratified by sex and 10-year age groups. Using time series regression analysis, we estimated the effect of the pandemic period (2020−2021) on quarterly Influenza and Pneumococcal vaccination rates. ResultsIn the first year of the pandemic (2020), Influenza, Pneumococcus and Herpes zoster coverage in both sexes increased by 9.9, 8.7, and 2.5 percentage points (pp), respectively. In 2021, Influenza coverage decreased by 4.7 pp., while Pneumococcus and Herpes zoster coverage increased by 2.7 and 3.8 pp., respectively. Influenza and Pneumococcal vaccinations showed a seasonal pattern, with vaccinations occurring mainly in the fourth quarter; this pattern was distorted for Pneumococcus during the pandemic. Per the time series regression analysis, Influenza vaccination rates in the fourth quarters of 2020 and 2021 were 7.86 (95 %CI: 5.10–10.62) and 8.87 (95 %CI: 5.80–11.54) pp. higher for males and females, respectively, compared to that of the pre-pandemic period. During the pandemic, the quarterly Pneumococcal vaccination rates increased by 0.68 (95 %CI: 0.19–1.18) pp. in males and 0.80 (95 %CI: 0.30–1.30) pp. in females. ConclusionThe heightened increase in vaccination rates observed in 2020 may have resulted from increased vaccination awareness during the pandemic. As the pandemic effect wanes, more efforts are needed to sustain and increase these vaccination rates.

Colocation of COVID-19 Vaccination Services at Syringe Service Programs for People Who Inject Drugs and People Experiencing Houselessness in Oregon.

Integrating vaccination services with other essential health services could increase vaccination rates among socially marginalized populations. We examined the associations between colocation of vaccines at syringe service programs and COVID-19 vaccination status among people who inject drugs and people experiencing houselessness. This study included 1891 participants aged ≥18 years at 9 sites in Oregon from July 2021 through March 2022. Participants self-reported whether they had ever received ≥1 dose of a COVID-19 vaccine. We calculated site-level COVID-19 vaccine availability and overall vaccination rates. We compared site-level vaccination rates and analyzed the association between vaccine availability and vaccination status. We found no significant difference in vaccination rates between sites that did and did not offer COVID-19 vaccines (t7 = -0.33; P = .75). We also found no significant association between vaccine availability and vaccination status. However, the odds of having received a COVID-19 vaccine were 2.79 times higher for each additional site visit during which COVID-19 vaccines were available (odds ratio [OR] = 2.79; 95% CI, 2.18-3.58; P < .001). The association between vaccine availability and vaccine status was not moderated by participant age (OR = 1.03; 95% CI, 0.99-1.07; P = .13) or housing instability (OR = 0.59; 95% CI, 0.13-2.60; P = .48). Colocating COVID-19 vaccines at syringe service programs was only positively associated with vaccination status if vaccines were offered frequently on-site. Future work should examine whether the frequency of offering vaccination services increases willingness to engage in vaccination and examine trust and convenience as potential mechanisms.

"Life as We Knew It": Continued Challenges in Getting Up-to-Date COVID-19 Vaccinations Amongst Black and Latinx Michigan Residents.

Minority communities are disproportionately impacted by COVID-19. In Michigan in 2024, 59% of Latinx residents, 46% of Black residents, and 57% of White residents have received at least one dose of the vaccine. However, just 7% of Black residents and 6% of Latinx residents report being up-to-date per CDC definition, versus 13% of White residents. Drawing from protection motivation theory, we aimed to identify barriers to COVID-19 vaccination. Interviews with 24 Black and 10 Latinx Michigan residents self-reported as not up-to-date (n = 15) or up-to-date (n = 19) on COVID-19 vaccines were conducted in 2022-2023. We used a community-based participatory approach in collaboration with 16 leaders from 15 organizations to develop research questions, interview protocols, and methods for data collection and analysis. Thematic coding of interviews was conducted. Findings indicate participants' lack of confidence in the COVID-19 vaccine's efficacy, with those not up-to-date expressing greater doubt. Participants were also concerned about vaccine benefits versus risks, safety, and side effects. Distrust in medicine, confusion about public health guidelines, and conspiracy theories were often reported. Younger unvaccinated individuals cited low health risk as reason to remain unvaccinated. Many participants felt that health education, especially through medical professionals, was beneficial. There is great need for more data to make informed decisions given ongoing lack of understanding of the public health benefits of COVID-19 vaccination. Identifying drivers of vaccine uptake, particularly boosters, in communities of color and developing age-appropriate and culturally responsive interventions to increase vaccination rates are of utmost importance.

Current and new vaccines against pneumococci

Pneumococcal vaccination plays acrucial role in the prevention of bacterial respiratory infections caused by Streptococcus pneumoniae. Pneumococci are responsible for diseases such as pneumonia, sinusitis and acute otitis media and can cause serious invasive infections such as meningitis and bacteraemia. Pneumococcal pneumonia leads to increased morbidity and mortality, particularly in patients with chronic lung diseases such as chronic obstructive pulmonary disease (COPD). The introduction of 13-valent conjugate vaccines (pneumococcal conjugate vaccine13 [PCV13]) has significantly reduced the burden of disease. However, infections caused by serotypes not covered by PCV13 continue to occur. Current vaccines such as the 20-valent conjugate vaccine (PCV20) provide extended serotype coverage and have shown arobust immune response in clinical trials. The recently updated recommendations of the German Standing Committee on Vaccination (Ständige Impfkommission, STIKO) include the use of PCV20 for all indication categories in adults, which represents asimplified and more effective vaccination strategy. Future developments include vaccines with even broader serotype coverage and improved immunological properties; these are expected to further reduce the burden of pneumococcal disease. Improving vaccination uptake and increasing vaccination rates, particularly among at-risk groups, remain key objectives to protect public health in the long term.

Role of Vaccination Strategies to Host-Pathogen Dynamics in Social Interactions.

This study presents extended Immunity Agent-Based Model (IABM) simulations to evaluate vaccination strategies in controlling the spread of infectious diseases. The application of IABM in the analysis of vaccination configurations is innovative, as a vaccinated individual can be infected depending on how their immune system acts against the invading pathogen, without a pre-established infection rate. Analysis at the microscopic level demonstrates the impact of vaccination on individual immune responses and infection outcomes, providing a more realistic representation of how the humoral response caused by vaccination affects the individual's immune defense. At the macroscopic level, the effects of different population-wide vaccination strategies are explored, including random vaccination, targeted vaccination of specific demographic groups, and spatially focused vaccination. The results indicate that increased vaccination rates are correlated with decreased infection and mortality rates, highlighting the importance of achieving herd immunity. Furthermore, strategies focused on vulnerable populations or densely populated regions prove to be more effective in reducing disease transmission compared to randomly distributed vaccination. The results presented in this work show that vaccination strategies focused on highly crowded regions are more efficient in controlling epidemics and outbreaks. Results suggest that applying vaccination only in the densest region resulted in the suppression of infection in that region, with less intense viral spread in areas with lower population densities. Strategies focused on specific regions, in addition to being more efficient in reducing the number of infected and dead people, reduce costs related to transportation, storage, and distribution of doses compared to the random vaccination strategy. Considering that, despite scientific efforts to consolidate the use of mass vaccination, the accessibility, affordability, and acceptability of vaccines are problems that persist, investing in the study of strategies that mitigate such issues is crucial in the development and application of government policies that make immunization systems more efficient and robust.

Links between Vaccination Fear-, Anxiety-, Alexithymia-, and Type D Personality-Related Vaccination Decisions: A Network Analysis in a Multicultural Sample.

This study examines the links between vaccination status, fear of vaccination (cognitive and somatic symptoms), anxiety, alexithymia, and type D personality (negative affect and social inhibition), to propose policies to increase vaccination rates. A sample of university students (n = 2535; mean age = 20.59, SD = 2.04; male: 26.75%, female: 73.25%) from Spain, Italy, Lebanon, Nigeria, Turkey, and Ukraine completed the Vaccination Fear Scale (VFS-6), the Generalised Anxiety Disorder scale (GAD-7), the Perth Alexithymia Questionnaire-Short Form (PAQ-S), the Type D Scale (DS14), and also a question on vaccination status. Correlation, regression, and network analyses were applied. Cognitive symptoms of fear of vaccination and negative affect were the most significant in the correlation and regression analyses. In the network analysis, negative affect showed the highest values in all centrality indices and positive relationships with other nodes. Vaccination status showed negative relationships with fear of vaccination, alexithymia, and social inhibition. The network structure is similar between the sexes but varies between cultures and sexes within cultures. The relationship between vaccination status and cognitive symptoms of fear of vaccination was the most consistent, allowing for interventions at this level to be advised across cultures. For more specific interventions, cultural context must be considered for optimal results.