Skip directly to site content Skip directly to search An official website of the United States government Here's how you know Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.
Respiratory Syncytial Virus (RSV) Español About Describes the basics of respiratory syncytial virus (RSV) Learn More July 7, 2025 Vaccines for Adults Information on vaccines to protect adults ages 50 and older against RSV. July 7, 2025 Immunizations to Protect Infants Information about RSV immunization to protect your baby from severe RSV illness. Aug. 29, 2024
For Professionals
Clinical Guidance Clinical considerations for people at increased risk of severe RSV disease. July 7, 2025 Diagnostic Testing Information on how to test for RSV. Aug. 27, 2024 Surveillance Information on RSV surveillance systems. July 8, 2025
RSV
Respiratory syncytial virus (RSV) usually causes mild, cold-like symptoms in most people, but it is the leading cause of infant hospitalization in the U.S.