Tweet from celinegounder at December 18, 2021 at 04:02PM

We absolutely saw variants coming.

When you allow a virus to spread from person to person, it will replicate & mutate.

That’s how variants emerge: more infectious, more immune evading, &/or more virulent.

That’s Virology 101. https://t.co/2utPIPcB3C

— Céline Gounder, MD, ScM, FIDSA (@celinegounder)
Dec 19, 2021

from http://twitter.com/celinegounder