Contribution of Respiratory Syncytial Virus to Burden of Lower Respiratory Tract Infections: A Global Analysis of 204 Countries and Territories, 1990-2021.

Respiratory syncytial virus (RSV) is a major cause of morbidity and mortality from lower respiratory infections (LRIs) worldwide. This study analyzes trends in age-standardized death rates (ASDRs) and disability-adjusted life years (DALYs) due to RSV-induced LRIs from 1990 to 2019, using data from the Global Burden of Disease Study 2021 (GBD 2021). The findings show a gradual decline in deaths, ASDR, and DALYs throughout this period. However, these indicators were higher in men than in women, as well as more pronounced in sub-Saharan West Africa. Developed countries exhibited higher ASDR and DALY values than developing countries, with the highest burden observed among children and the elderly in low Socio-demographic Index (SDI) regions. Globally, RSV-induced LRIs have shown a significant reduction in burden, but interventions are still urgently needed-particularly in low SDI areas-to reduce the impact on vulnerable populations. Public health policies focusing on these high-risk groups are essential for addressing the remaining disparities in RSV-related morbidity and mortality.