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 activity is the percentage of doctor’s office visits driven by flu-like symptoms ...

Donald Trump’s second administration has advanced an avalanche of policy action and political pronouncements that have jolted Washington and, in some cases, the world.

Some public health data related to AIDS, substance use and avian flu went missing from federal websites, although some was ...