March 30, 2026- Respiratory syncytial virus (RSV) season in the U.S. usually begins in October and fades by late March, but RSV activity seems to be remaining steady for spring 2026. Centers for Disease Control (CDC) data, as of March 25, show declining influenza and COVID-19 levels, while RSV is high or very high in nine states across the nation. The CDC stated that while RSV activity is elevated, it has now peaked in many regions of the country. Overall, the number of new RSV infections seems to be declining or likely declining in a majority of U.S. states, according to CDC data.