Over 160,000 people this season have landed in the hospital from flu complications, CDC estimates. More than 6,600 have died.

The map of flu activity across the United States continues to darken, both figuratively and literally, as case numbers spike ...

Avian influenza A (H5N1) has mutated, so the symptoms of bird flu could change as more people get sick in 2025.

A pandemic is not inevitable, scientists say. But the outbreak has passed worrisome milestones in recent weeks, including ...

According to the U.S. Centers for Disease Control and Prevention (CDC), there have been at least 12 million flu infections since the fall in the U.S., leading to 160,000 hospitalizations and 6,600 ...