Since early 2024, the U.S. has logged 66 human cases of H5N1. Scientists are keeping a watchful eye on the virus’s spread as we enter a new year.

For the past four years, almost like clockwork, the start of holiday season has been marked by an unwelcome guest: sharply ...

Flu cases are high in California with respiratory virus season in full swing. About 20% of tests for influenza came back as positive in California for the week of Dec. 29 to Jan. 4, according to the ...