March 11, 2026- The Centers for Disease Control (CDC) released an update on nationwide respiratory virus activity as of March 6, 2026. The amount of acute respiratory illness causing people to seek health care is now low. Seasonal influenza activity remains elevated nationally. Influenza A activity is decreasing in most areas of the country while trends in influenza B activity vary by region, according to the CDC.
RSV activity has started later than expected in most regions of the United States, though severity is not higher compared with recent seasons, per the CDC. This atypical season indicates that higher levels of RSV activity may continue into April in many regions. Emergency department visits and hospitalizations for RSV are highest among infants and children less than 4 years old. Additionally, COVID-19 activity is decreasing nationally but remains elevated in some areas of the country.