Flu season might be winding down — but don’t stash the tissues just yet. A little-known respiratory virus with no vaccine or treatment has been quietly picking up steam since the start of winter, ...

Some surveys have shown that nearly 30% of people believe getting a flu shot can actually cause influenza. This belief is likely due to common side effects linked to the vaccine, including headache, ...

Here's what might be making you sick - and what to do next.

The flu vaccine may not be very effective this winter, according to U.S. health officials who worry this may lead to more serious illnesses and deaths. As flu season begins to ramp up, officials say ...

Prior exposure to one strain of influenza virus may weaken children's ability to mount an effective antibody response against their subsequent exposure to a different flu strain, according to a study ...

The 2026 flu season is off to a heavy start with the spread of a new variant that has taken Florida by force. Dubbed the "super flu," the Centers for Disease Control and Prevention has alerted Florida ...

Add Yahoo as a preferred source to see more of our stories on Google. Boy get cold and blow her nose at home. Vera Livchak / Getty Images It started after a Christmas party. Natalie Rowe, a ...

Illinois Department of Public Health officials urge residents to take precautions as the state sees “very high” levels of influenza activity, along with moderate COVID transmission. The state has ...