antigenic shift

One of the more concerning recent developments (since around the beginning of this year) is the confirmed transmission of avian flu to dairy cows.
“The ongoing spread of High Pathogenicity Avian Influenza (HPAI) in different regions of the world, alongside the recent detections of cases in cattle, is raising concerns within the international community….
There are signs of a mid-summer surge in COVID-19 cases, particularly in the South and West, that have