One indicator of flu activity is the percentage of doctor’s office visits driven by flu-like symptoms. Last week, that number ...

Is the COVID-19 vaccine safe and effective for infants and young children, and what side effects might kids experience? Here's why it's so important for children to get the COVID-19 vaccine.

By 1957, scientists had a significantly more sophisticated understanding of influenza, worrying them that a pandemic similar ...

The flu is spreading far and wide across the U.S. – and influenza A is largely to blame. Of all the flu tests reported to the ...