Determinants Of Vaccination Coverage Research Articles

Association of culturally competent care with influenza vaccination coverage in the United States

BackgroundCultural minority groups in the United States have lower vaccination rates or worse influenza-related outcomes. Culturally competent care, which aims to engage the social, cultural, and linguistic needs of all patients, may address some of these disparities. ObjectiveWe investigate how self-reported measures of culturally competent care is associated with influenza vaccination rates in the United States. MethodsThe National Health Interview Survey (NHIS) 2017 was queried for respondents asked a set of questions which assessed respondents’ access to culturally competent care in the past year. The outcome of interest was self-reported receipt of the annual influenza vaccine. Sample-weighted multivariable logistic regressions estimated the adjusted odds ratios and 95 % confidence intervals (95 %CI) of influenza vaccination with response to the cultural competency survey questions as the dependent variable of interest. Subsequent marginal modeling predicted the adjusted vaccination rates among cultural minorities (racial/ethnic minorities, LGBTQ + adults, foreign-born individuals, and non-English speakers) and respondents with high-risk comorbidities for worse influenza outcomes. Models were adjusted for other known determinants of vaccination coverage. Results20,303 sample adults were included in the analyses. There were significantly higher odds of influenza vaccination among respondents who were “always” or “most of the time” treated with respect by their providers (aOR 1.53, 95 %CI [1.23–1.90], P < 0.001), given easy-to-understand information (aOR 1.37, 95 %CI [1.19–1.58], P < 0.001), asked about their opinions or beliefs about their care (aOR 1.29, 95 %CI [1.19–1.39], P < 0.001), and seen by providers who shared or understood their culture (aOR 1.15 95 %CI [1.01–1.30], P = 0.03), compared to their counterparts who responded with “some” or “none of the time” to the same survey questions. Higher adjusted influenza vaccination rates were seen among multiple racial/ethnic groups, LGBTQ + adults, foreign-born individuals, non-English speakers, and individuals with high-risk comorbidities who reported positive responses to the cultural competency survey questions. ConclusionsWe demonstrate a positive association between self-reported frequency of access to culturally competent care and receipt of the annual influenza vaccine. These findings support future efforts to evaluate vaccination outcomes among patients who receive components of culturally competent care, such as linguistically appropriate services, race-concordant healthcare workforce, and community engagement.

Coverage and Drivers to Reaching the Last Child With Vaccination in Urban Settings: A Mixed-Methods Study in Kampala, Uganda.

Limited evidence exists regarding the drivers of vaccination coverage and equity in Kampala city, despite frequent measles outbreaks, inequities in vaccination coverage, and the decline in vaccination coverage rates. This study was designed to determine vaccine coverage among children aged 12-36 months and to understand its demand-side drivers. We utilized a mixed-methods parallel convergent study design. A household survey was conducted to quantify the drivers of vaccine coverage among households with children aged 12-36 months. We employed a multistage sampling approach to select households, using a primary sampling unit of an enumeration area. We conducted 30 key informant interviews, 7 focus group discussions, and 6 in-depth interviews with representatives from the immunization program, health workers, and parents residing in areas with low vaccine coverage. Of the 590 enrolled children, 340 (57.6%) were partially vaccinated, 244 (41.4%) were fully vaccinated and had received all the recommended vaccinations, and 6 (1.0%) had never received any vaccine. Of the 244 with all recommended vaccinations, only 65 (26.6%) received their vaccines on time. Access to vaccination services was high (first dose of diphtheria, pertussis, and tetanus [DPT1] coverage of 96%), but utilization decreased over time, as shown by a dropout rate of 17.3% from the first to third dose of DPT. The main driver of complete vaccination was the parents' appreciation of the benefits of vaccination. Among partially vaccinated children, the barriers to vaccination were inadequate information about vaccination (its benefits and schedule), vaccine stock-outs, long waiting times to receive vaccination services, and hidden vaccination costs. Vaccination needs to be targeted to all children irrespective of whether they reside in slum areas or nonslum areas, as most are under-vaccinated. Social mobilization and communication efforts should be tailored to the complexities of urban settings characterized by transient and diverse populations with different cultures.

Determinants of vaccine coverage and timeliness in a northern Pakistani village.

The incidence of vaccine preventable disease in Pakistan remains high despite a long-standing Expanded Program on Immunization (EPI). We describe vaccine completeness, timeliness and determinants of coverage from a remote rural cohort (2012–2014). Vaccination histories were taken from EPI records. Vaccination was complete if all doses were received according to the EPI schedule and timely if doses were not ≥3 days early or ≥ 28 days late. Three models are presented: a multivariable logistic regression of household demographic and socioeconomic factors associated with complete vaccination, a multivariable mixed effects logistic regression assessing whether or not the vaccine was administered late (versus on-time), and a mixed effects multivariable Poisson regression model analysing the interval (in days) between vaccine doses. Of 959 enrolled children with full vaccination histories, 88.2 and 65.1% were fully vaccinated following either the pentavalent or DPT/HBV schedules if measles was excluded; coverage dropped to 50.0 and 27.1% when both doses of measles were included. Sixty-four (6.7%) were unvaccinated. Coverage and timeliness declined with subsequent doses. Migrating into the village after 1995 (95%CI 1.88 to 5.17) was associated with late vaccination. Being male, having an older father, and having parents with at least some formal education reduced the likelihood of a late dose. The interval between doses was consistent at 5 weeks (compared with the 4 weeks recommended by EPI). None of the socio-demographic variables were related to the likelihood of receiving full coverage. Vaccine coverage in Oshikhandass was higher than national averages. Measles vaccine coverage and timeliness were low; special consideration should be paid to this vaccine. The local vaccination schedule differed from the EPI, but the consistency suggests good local administration.

Individual and community-level determinants of childhood vaccination in Ethiopia

BackgroundVaccines are one of our most important tools for preventing outbreaks and keeping the world safe. Most unvaccinated children live in the poorest countries including Ethiopia. Therefore, this study aimed to identify the determinants of vaccination coverage among children aged12–23 months in Ethiopia.MethodsA cross-sectional secondary data were obtained from the 2016 Ethiopian Demographic and Health Survey data (EDHS). A total of 1929 children were included. A Multilevel Proportional Odds Model was used to identify the individual and community-level factors associated with child vaccination.ResultAmong 1, 929 children, only 48.6% (95% CI: 46.3 to 50.8%) were fully vaccinated while 37.8% (95% CI: 35.7 to 40.1%) were partially vaccinated.. The multilevel ordinal logistic regression model reveled that housewife mother (AOR =1.522, 95%CI: 1.139, 2.034), institutional delivery (AOR =2.345, 95%CI: 1.766, 3.114),four or above antenatal care visits (AOR = 2.657; 95% CI: 1.906, 3.704), children of mothers with secondary or higher education (AOR = 2.008; 95% CI: 1.209, 3.334),Children whose fathers primary education (AOR = 1.596; 95% CI: 1.215, 2.096), from the rich households (AOR = 1.679; 95% CI: 1.233, 2.287) were significantly associated with childhood vaccination.ConclusionChild vaccination coverage in Ethiopia remains low. Therefore, there is a need to increase child vaccination coverage by promoting institutional delivery and prenatal care visits, as well as maternal tetanus immunization. Besides, public initiatives needed to improve child vaccination coverage, women’s and husband’s education, poor women, and further advancement of health care services for poor women, housewife women, women living in remote areas should be made to maintain further improvements in child vaccination. Furthermore, policies and programs aimed at addressing cluster variations in child vaccination need to be formulated and their implementation must be strongly pursued.

Análise do estado de cobertura vacinal de crianças menores de três anos no município de Fortaleza em 2017

Objetivo: Analisar o estado atual da cobertura vacinal (CV) de crianças menores de três anos no município de Fortaleza, CE, e sua relação com a condição socioeconômica das famílias. Métodos: Pesquisa transversal de base populacional com amostragem aleatória. As informações foram obtidas por meio da aplicação de questionários e conferência de Cadernetas de Saúde quanto ao estado vacinal, bem como de dados ecológicos de desenvolvimento humano. A CV foi estimada em crianças na faixa etária de 19 a 36 meses. Resultados: Observou-se que 45,2% das crianças estudadas apresentavam-se com a CV recomendada pelo Ministério da Saúde (MS). Além disto, verificou-se fatores socioeconômicos determinantes de cobertura vacinal e que áreas descobertas de Agentes Comunitários de Saúde apresentaram pior cobertura. Conclusão: O presente estudo revela que é necessário fortalecer as ações que aumentem as cobertura vacinais no município.

Determinants of Vaccination Coverage and Consequences for Rabies Control in Bali, Indonesia.

Maintaining high vaccination coverage is key to successful rabies control, but mass dog vaccination can be challenging and population turnover erodes coverage. Declines in rabies incidence following successive island-wide vaccination campaigns in Bali suggest that prospects for controlling and ultimately eliminating rabies are good. Rabies, however, has continued to circulate at low levels. In the push to eliminate rabies from Bali, high coverage needs to be maintained across all areas of the island. We carried out door-to-door (DTD) questionnaire surveys (n = 10,352 dog-owning households) and photographic mark–recapture surveys (536 line transects, 2,597 observations of free-roaming dogs) in 2011–2012 to estimate dog population sizes and assess rabies vaccination coverage and dog demographic characteristics in Bali, Indonesia. The median number of dogs per subvillage unit (banjar) was 43 (range 0–307) for owned dogs estimated from the DTD survey and 17 (range 0–83) for unconfined dogs (including both owned and unowned) from transects. Vaccination coverage of owned dogs was significantly higher in adults (91.4%) compared to juveniles (<1 year, 43.9%), likely due to insufficient targeting of pups and from puppies born subsequent to vaccination campaigns. Juveniles had a 10–70 times greater risk of not being vaccinated in urban, suburban, and rural areas [combined odds ratios (ORs): 9.9–71.1, 95% CI: 8.6–96.0]. Free-roaming owned dogs were also 2–3 times more likely to be not vaccinated compared to those confined (combined Ors: 1.9–3.6, 95% CI: 1.4–5.4), with more dogs being confined in urban (71.2%) than in suburban (16.1%) and rural areas (8.0%). Vaccination coverage estimates from transects were also much lower (30.9%) than household surveys (83.6%), possibly due to loss of collars used to identify the vaccination status of free-roaming dogs, but these unconfined dogs may also include dogs that were unowned or more difficult to vaccinate. Overall, coverage levels were high in the owned dog population, but for future campaigns in Bali to have the highest chance of eliminating rabies, concerted effort should be made to vaccinate free-roaming dogs particularly in suburban and rural areas, with advertising to ensure that owners vaccinate pups. Long-lasting, cheap, and quick methods are needed to mark vaccinated animals and reassure communities of the reach of vaccination campaigns.

Determinants of Vaccination Coverage Against Human Papillomavirus in 10-year-old Girls in 2016 in Rural Senegal

Cervical cancer is the first gynecological cancer in Senegal. As part of the cancer control plan, the Ministry of Health and Social Action conducted a pilot phase of HPV vaccination in the districts of Dakar and Mekhe between 2014 and 2016. The objective of this survey is to study the determinants of HPV vaccination coverage in 10-year-old girls in 2016 in the Mekhe health district. This is a descriptive cross-sectional epidemiological study for analytical purposes. A two-stage survey was conducted. The data were collected during an individual interview at the homes of the mothers. The compendium focused on personal characteristics, knowledge and practices on immunization. Full vaccination coverage was determined. Logistic regression was used to identify factors associated with immunization coverage. Respondents were 300 The mean age was 35 ± 9.64 years. Mothers who knew how to prevent cervical cancer were 171 or 57% [95% CI: 51.2-62.7]. Immunization coverage for girls aged 10 years was 86.3% [95% CI: 81.9-90.0]. The discontinuation between the first and second dose of the vaccine was 6.5% [95% CI: 3.9-10.1]. HPV vaccine coverage was related to the residence environment (OR = 3, 18 [95% CI: 1.34-7.56]); (OR = 22.02, [95% CI: 4.2-113.4]) and information for mothers (OR = 10.92 [95% CI: 2.93-40.64]). Vaccination against HPV is a preventive activity that requires the collaboration with the education sector and a good proximity communication.

Factors influencing full immunization coverage among 12-23 months of age children in Ethiopia: evidence from the national demographic and health survey in 2011.

BackgroundImmunization remains one of the most important public health interventions to reduce child morbidity and mortality. The 2011 national demographic and health survey (DHS) indicated low full immunization coverage among children aged 12–23 months in Ethiopia. Factors contributing to the low coverage of immunization have been poorly understood. The aim of this study was to identify factors associated with full immunization coverage among children aged 12–23 months in Ethiopia.MethodsThis study used the 2011 Ethiopian demographic and health survey data. The survey was cross sectional by design and used a multistage cluster sampling procedure. A total of 1,927 mothers with children of 12–23 months of age were extracted from the children’s dataset. Mothers’ self-reported data and observations of vaccination cards were used to determine vaccine coverage. An adjusted odds ratio (AOR) with 95 % confidence intervals (CI) was used to outline the independent predictors.ResultsThe prevalence of fully immunized children was 24.3 %. Specific vaccination coverage for three doses of DPT, three doses of polio, measles and BCG were 36.5 %, 44.3 %, 55.7 % and 66.3 %, respectively. The multivariable analysis showed that sources of information from vaccination card [AOR 95 % CI; 7.7 (5.95-10.06)], received postnatal check-up within two months after birth [AOR 95 % CI; 1.8 (1.28-2.56)], women’s awareness of community conversation program [AOR 95 % CI; 1.9 (1.44-2.49)] and women in the rich wealth index [AOR 95 % CI; 1.4 (1.06-1.94)] were the predictors of full immunization coverage. Women from Afar [AOR 95 % CI; 0.07 (0.01-0.68)], Amhara [AOR 95 % CI; 0.33 (0.13-0.81)], Oromiya [AOR 95 % CI; 0.15 (0.06-0.37)], Somali [AOR 95 % CI; 0.15 (0.04-0.55)] and Southern Nation and Nationalities People administrative regions [AOR 95 % CI; 0.35 (0.14-0.87)] were less likely to fully vaccinate their children.ConclusionThe overall full immunization coverage in Ethiopia was considerably low as compared to the national target set (66 %). Health service use and access to information on maternal and child health were found to predict full immunization coverage. Appropriate strategies should be devised to enhance health information and accessibility for full immunization coverage by addressing the variations among regions.

Determinants of vaccination coverage and adherence to the Greek national immunization program among infants aged 2-24 months at the beginning of the economic crisis (2009-2011).

BackgroundChildhood immunization has significantly reduced the incidence of vaccine preventable diseases. Parental mistrust over vaccine safety has been associated with vaccine refusal creating barriers on vaccine coverage. Recently, economic crisis has imposed additional impediment.MethodsStudy aim was to evaluate vaccine coverage among infants 2-24 months old in the Athens metropolitan area at the beginning of the economic crisis (2009-2011).ResultsOverall, 1,667 infants were enrolled (mean age 13 months). Less than 5% of parents admitted omitting or postponing vaccination secondary to their beliefs. Although vaccination coverage was acceptable for most vaccines, lower rates of immunization were found for some newer vaccines such as hepatitis A and rotavirus. Multiple regression analysis indicated that parental age, occupational, educational statuses and family size were independently associated with immunization coverage at 6 and 12 months. Interestingly, lack of insurance was not associated with missed vaccine doses.ConclusionIncomplete vaccination coverage was associated with socioeconomic factors. It becomes apparent, that reassessing vaccination priorities under the current economic situation may be needed.

Immunizations against respiratory infections in children in primary health care in poland: coverage and delays.

Pneumococcal infections, pertussis, and influenza are vaccine-preventable diseases. The aim of this study was to determine vaccine coverage and compliance with the dosage regimen among children in Poland. We performed a retrospective chart analysis of 1,356 children in a large primary healthcare establishment. The complete primary pertussis vaccination, 3 doses in the first year of life, was administered to 1,310/1,356 patients (96.6 %). The self-paid combined acellular vaccine was given in 55.2 % of children. The first dose of the pertussis vaccine was administered in a timely manner to 67.1 % of children. The self-paid pneumococcal vaccine was administered in 499/1,356 (36.8 %) children. In 46.1 % of them immunization started within the first 6 months of life; in 12.6 % aged 7-11 months, in 12.6 % aged 12-23 months, and in 28.7 % aged over 24 months. The dosage regimen was compliant in 49.2 % of patients. Only 3.5 % of patients were immunized against both pneumococci and influenza. Compliance with the Polish immunization program should be increased by reducing the number of injections and the cost of vaccines. Education is essential to facilitate simultaneous administration of vaccines during one visit and to prepare the parents for judicious decision-making when it comes to vaccinations.

The Norwegian immunisation register – SYSVAK

The Norwegian immunisation register, SYSVAK, is a national electronic immunisation register. It became nationwide in 1995. The major aim was to register all vaccinations in the Childhood Immunisation Programme to ensure that all children are offered adequate vaccination according to schedule in the programme, and to secure high vaccination coverage. Notification to SYSVAK is mandatory, based on personal identification numbers. This allows follow up of individual vaccination schedules and linkage of SYSVAK data to other national health registers for information on outcome diagnoses, such as the surveillance system for communicable diseases. Information from SYSVAK is used to determine vaccine coverage in a timely manner. Coverage can be broken down to regional/local levels and used for active surveillance of vaccination coverage and decisions about interventions. During the 2009 influenza A(H1N1)pdm09 pandemic, an adaptation of SYSVAK enabled daily surveillance of vaccination coverage on national and regional levels. Currently, data from SYSVAK are used, among others, in studies on adverse events related to pandemic vaccination. Future challenges include maximising usage of collected data in surveillance and research, and continued improvement of data quality. Immunisation registers are rich sources for high quality surveillance of vaccination coverage, effectiveness, vaccine failure and adverse events, and gold mines for research.

Effectiveness and impact of hepatitis B virus vaccination of children with at least one parent born in a hepatitis B virus endemic country: an early assessment

ObjectiveTo determine the effectiveness and impact of the Dutch childhood hepatitis B virus (HBV) vaccination policy targeted at children with at least one parent born in a HBV endemic country.MethodsThe...

Determinants of vaccination coverage in rural Nigeria

BackgroundChildhood immunization is a cost effective public health strategy. Expanded Programme on Immunisation (EPI) services have been provided in a rural Nigerian community (Sabongidda-Ora, Edo State) at no cost to the community since 1998 through a privately financed vaccination project (private public partnership). The objective of this survey was to assess vaccination coverage and its determinants in this rural community in NigeriaMethodsA cross-sectional survey was conducted in September 2006, which included the use of interviewer-administered questionnaire to assess knowledge of mothers of children aged 12–23 months and vaccination coverage. Survey participants were selected following the World Health Organization's (WHO) immunization coverage cluster survey design. Vaccination coverage was assessed by vaccination card and maternal history. A child was said to be fully immunized if he or she had received all of the following vaccines: a dose of Bacille Calmette Guerin (BCG), three doses of oral polio (OPV), three doses of diphtheria, pertussis and tetanus (DPT), three doses of hepatitis B (HB) and one dose of measles by the time he or she was enrolled in the survey, i.e. between the ages of 12–23 months. Knowledge of the mothers was graded as satisfactory if mothers had at least a score of 3 out of a maximum of 5 points. Logistic regression was performed to identify determinants of full immunization status.ResultsThree hundred and thirty-nine mothers and 339 children (each mother had one eligible child) were included in the survey. Most of the mothers (99.1%) had very positive attitudes to immunization and > 55% were generally knowledgeable about symptoms of vaccine preventable diseases except for difficulty in breathing (as symptom of diphtheria). Two hundred and ninety-five mothers (87.0%) had a satisfactory level of knowledge. Vaccination coverage against all the seven childhood vaccine preventable diseases was 61.9% although it was significantly higher (p = 0.002) amongst those who had a vaccination card (131/188, 69.7%) than in those assessed by maternal history (79/151, 52.3%). Multiple logistic regression showed that mothers' knowledge of immunization (p = 0.006) and vaccination at a privately funded health facility (p < 0.001) were significantly correlated with the rate of full immunization.ConclusionEight years after initiation of this privately financed vaccination project (private-public partnership), vaccination coverage in this rural community is at a level that provides high protection (81%) against DPT/OPV. Completeness of vaccination was significantly correlated with knowledge of mothers on immunization and adequate attention should be given to this if high coverage levels are to be sustained.

Distribution of serotypes and antibiotic resistance of invasive pneumococcal disease isolates among children aged 5 years and under in Saudi Arabia (2000–2004)

To determine vaccine coverage of invasive pneumococcal disease (IPD) in Saudi Arabian children aged 5 years and under, 350 IPD isolates were tested for antibiotic susceptibility. Of these 46%, 42% and 12% were penicillin-sensitive, pencillinintermediate, and penicillin-resistant, respectively. Rates of resistance to erythromycin and cefotaxime were 26% and 6%, respectively. The potential serotype coverage of the PCV7 vaccine in Saudi Arabia among children <5 years of age is 62%, and vaccine coverage significantly improved in children <2 years of age, to reach 83% against IPD isolates. PCV7 is expected to have a substantial impact on the burden of invasive and antibiotic-resistant pneumococcal disease in Saudi Arabia.

Determinants of vaccination coverage in Malawi: Evidence from the demographic and health surveys

The purpose of this paper is to identify groups of children in Malawi who are less or not reached by vaccination services by using data from the Demographic and Health Surveys conducted in Malawi in 1992, 1996, 2000 and 2004. These surveys have shown that the proportion of children aged 12-23 months who were fully vaccinated by 12 months of age has been decreasing: it was 67% in 1992, then 55%, 54% and 51% in 1996, 2000 and 2004, respectively. The review has also shown that birth order of the child, residence (rural/urban) and mother's education are major determinants of the immunization status of the child.

Measles immunity and immunisation status in Australian children 1 to 4 years of age

Determine measles seropositivity and vaccine coverage in children aged 1 to 4 years inclusive. Compare data in those who produced immunisation records and those who relied on parental recall. Establish variables associated with seropositivity. Population- and area-based, cluster sample of 1- to 4-year-olds; households surveyed by trained interviewer. Australia-wide, excluding New South Wales. Questionnaires completed between February and April 1995. 2117 completed questionnaires were returned for children aged 1 to 4 years, 923 of whom provided a sufficient blood sample for analysis. Overall seropositivity was 86% for the 923 children tested and was strongly associated with previous immunisation (P < 0.001) and age (P < 0.001), but not with parental report of a previous measles diagnosis (P = 0.581). Eight hundred and forty-three (91%) reported previous measles immunisation, with 760 (90%) of these testing seropositive. Four hundred and ninety-one (55%) parents/guardians produced immunisation records, while 400 (45%) relied on recall. Immunised children whose parents relied on recall were equally likely to be seropositive as children whose parents produced records. The 923 children tested were representative of the 2117 who completed questionnaires in all factors except age, where children below 2 years old were under represented (P < 0.001). These data support the current second routine measles immunisation prior to school entry, and reinforce the need to promote the first routine dose to achieve measles elimination.

Intestinal permeability in patients with coeliac disease and dermatitis herpetiformis.

Intestinal permeability was investigated in patients with coeliac disease and dermatitis herpetiformis by a 51Chromium-labelled ethylenediaminetetraacetate (51Cr-EDTA) absorption test and the results correlated with histomorphometric analysis and intraepithelial lymphocyte counts of jejunal biopsies. The mean (+/- SD) 24 hour urine excretion of 51Cr-EDTA in 34 healthy volunteers was 1.9 +/- 0.5% of the orally administered test dose. Patients with untreated coeliac disease (19) or untreated dermatitis herpetiformis (five) excreted significantly more 51Cr-EDTA than controls (5.9 +/- 2.7% and 4.6 +/- 2.1%, respectively, p less than 0.001) and all were outside the normal range of 1.0-2.6%. Patients with coeliac disease (42) treated for 6 months-23 years (mean 5 years) and patients with dermatitis herpetiformis (11) treated for 6 months-8 years (mean 3 years) excreted significantly more 51Cr-EDTA than controls, 4.2 +/- 2.4% p less than 0.0001 and 3.0 +/- 0.9% p less than 0.003 respectively. Eleven of 14 (79%) treated patients with coeliac disease with an entirely normal jejunal mucosae demonstrated abnormal intestinal permeability. Intestinal permeability did not correlate significantly with either the mucosal height/crypt depth ratio or intraepithelial lymphocyte counts in jejunal biopsies from patients with untreated or treated coeliac disease. The demonstration of a persistent increase in intestinal permeability in patients with both coeliac disease and dermatitis herpetiformis may suggest a common pathogenetic mechanism in both disorders. It is postulated that altered permeability may facilitate the entry of gluten or a fraction thereof into the lamina propria where it causes a cascade of immunological events.