Vaccines could be a way to suppress bird flu in the U.S. and avoid the slaughter of millions of chickens amid the rising price of eggs. But there are some concerns, too. Here's what to know.

No new human cases of avian influenza have been reported, and poultry infections are low so far in March. But infections in cats are continuing, and new research is raising concerns about the virus

Avian flu is hitting California’s San Joaquin Valley hard — nearly 20 million chickens, ducks and turkeys have been killed in the region since 2022, according to data from the Centers for Disease Control and Prevention.