How long can one RSV shot protect seniors? Study shows surprising two-year shield

A single RSV vaccine dose is proving to be a powerful shield for older adults, significantly reducing hospitalizations and severe illness over two consecutive RSV seasons. While protection is strongest in the first year and declines somewhat in the second, the findings highlight both the immediate benefits and the importance of ongoing monitoring. With RSV causing tens of thousands of hospitalizations every year in the U.S., this research underscores the potential of vaccination to save lives and guide future booster strategies.

source https://www.sciencedaily.com/releases/2025/09/250901104640.htm