Add Yahoo as a preferred source to see more of our stories on Google. Eggs are sold out at a Costco store in Monterey Park, Calif. (Zeng Hui/Xinhua via Getty Images) Bird flu is spreading across the ...

In a startling first, a Washington state man has been infected with a strain of bird flu previously only detected in animals and never before in humans. The “severely ill” man was hospitalized with a ...