A strain of bird flu known as H5N1 or highly pathogenic avian influenza has made a worrying leap to cattle herds across the US over the past month. This development has sparked “enormous concern” among health experts, including the World Health Organization’s (WHO) chief scientist, who warned of the virus’ “extremely high” mortality rate in humans.
Yeah, they talk about it in the WP article I linked to – that’s a “herdshare”. That’s also an issue, but at least the barrier is somewhat higher than just cruising down to the grocery store. You gotta be more of a True Believer and go out of your way to take part in one of those.
https://en.wikipedia.org/wiki/Herdshare