@BillGates: I made this video a few months ago to help explain what happens when a virus mutates. You can read more about the ways in which new variants are (and aren’t) complicating the pandemic here: https://t.co/luwOHz0hbJ https://t.co/l058kxZHgZ

http://twitter.com/BillGates

I made this video a few months ago to help explain what happens when a virus mutates. You can read more about the ways in which new variants are (and aren’t) complicating the pandemic here: https://t.co/luwOHz0hbJ https://t.co/l058kxZHgZ

— Bill Gates (@BillGates) Nov 29, 2021