That's the way one scientist puts it — referring to how infected wild birds survive long enough to spread it to birds and ...

"We've gone from this concept of dead birds don't fly to this new virus that seems ... Traveling in infected wild birds, the virus took off and jumped over to North America in late 2021.

UHART: It was just, like, birds flying, you know ... so the virus never took off globally. Then about five years ago, the virus changed. Erik Karlsson is the director of the Cambodian National ...