As measles has spread throughout the United States, many Americans have worried about their risk level. For the first time, a ...

Most flu infections this season are from a new variant not covered by the flu shot, but doctors say the vaccine will still ...

Dr. Yvonne Maldonado, Stanford Professor of pediatrics-infectious disease and epidemiology and population, discusses the new ...

Seasonal influenza is a contagious respiratory illness that can result in mild to severe illness, and is sometimes fatal, the ...

Almost 20 states are in the highest possible tier for influenza activity, according to the latest report by the CDC.

ABC30 and ABC News are taking action to keep people protected and informed, launching a tool that allows you to see your ...

When the number of vaccinated children drop too low in a school, the risk of infection increases there and in the wider ...

After a sharp uptick in flu cases in mid-December 2025, flu activity across the U.S. and Canada remains high. Although cases ...

California provided school-level MMR vaccination data for kindergartners. Map: Jacque Schrag/Axios San Diego County's measles ...

Cases of the flu continue to mount, with health officials recently recording the first pediatric flu-related deaths of the season, but some states are seeing much higher activity than others.

Cases of this highly contagious winter virus are worse than previous seasons. Here’s what you need to know. Flu-related ...