Abstract
In Germany, the estimation of the disease burden of respiratory syncytial virus (RSV) in older adults is limited. This makes it challenging for public health decision-makers to develop evidence-based recommendations for newly available vaccines against RSV for individuals aged 60years and older (60+). This study investigates publicly available data sources in Germany to address the current gaps in evidence regarding the burden of RSV. Hospitalisation databases from the German Federal Statistical Office and national mortality statistic between 2000 and 2023, as well as regular surveillance reports from the national public health institute since 2014, were utilised to extract, combine and analyse data on RSV-related morbidity and mortality. These data were used to triangulate the age-specific burden of RSV. The data indicate that the number of RSV-related outpatient consultations ranges between 1,313,100 and 3,911,800 cases per season from 2014/2015 to 2022/2023 for all age groups, with approximately 13.0% of outpatient consultations occurring in adults 60+. The significant increase in hospitalisations over time suggests that heightened testing due to the coronavirus disease 2019 (COVID-19) pandemic revealed the underdetection of inpatient RSV cases in pre-pandemic seasons. In the most recent season recorded, 2022/2023, the data show 12,800 RSV-related hospitalisations in adults 60+ (24% of all RSV-related hospitalisations) and 1340 in-hospital deaths in adults 60+ (93% of all RSV-related deaths). The comparison of pre- to post-pandemic seasons strongly suggest up to a sevenfold underdetection of RSV in individuals 60+, and the analysis of in-hospital mortality reveals higher mortality rates compared with the general German mortality statistics. These findings highlight the urgent need to improve surveillance and implement targeted prevention strategies to mitigate the impact of RSV in older adults.
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