The U.S. winter virus season is in full force, and by one measure is the most intense in 15 years. One indicator of flu ...

Pennsylvania National Electronic Disease Surveillance System. Influenza activity is high across the state and has increased ...

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It's an unusual winter for respiratory illnesses. The flu is peaking twice: once in early January and again in February.

Many nursing home residents are refusing COVID shots this winter, though flu vaccine penetration has remained strong historically.

During the COVID pandemic, RSV showed a slightly odd pattern: like flu, it basically disappeared in the 2020–2021 season, ...