The Louisville Metro Department of Public Health and Wellness reported a jump to 9,000 cases of the flu this week, up from ...

Experts said it raises new questions about wider spread and the difficulty of controlling infections in animals and the ...

After bird flu was detected in a stray cat in Half Moon Bay this week, health officials in San Mateo County are urging pet ...

With data showing a significant rise in flu cases nationwide, medical experts are describing it as the worst flu season since ...

Authorities in San Mateo County urged residents to take precautions after two cases of bird flu were detected in the county.

The US winter virus season is in full force, and by one measure is the most intense in 15 years. One indicator of flu activity is the percentage of doctor's office visits driven by flu-like symptoms.

Respiratory virus season is sweeping across the nation, and Washington hospitals are struggling to meet the need.