New versions of the H5N1 virus are increasingly adept at spreading. Suggestions to either let it rip in poultry or vaccinate the birds could backfire.

The U.S. Centers for Disease Control and Prevention (CDC) announced the end of the bird flu emergency, at least for now.

Dan Diamond is a White House reporter, with a focus on policy and public health. Reach him on Signal at @dan_diamond.01. Dan Diamond is a White House reporter for The Washington Post. He was ...