NIH director Francis Collins says Omicron may not be the ‘last emerging variant’ to cause concern

President Biden Announces New Actions to Protect Americans Against the Delta and Omicron Variants as We Battle COVID-19 this Winter New Actions Aim to Get Americans Boosted for Even Greater Protection Against the Delta and Omicron Variants, Keep Schools and

Read More NIH director Francis Collins says Omicron may not be the ‘last emerging variant’ to cause concern