The U.S. Centers for Disease Control and Prevention is stepping up efforts to track coronavirus mutations and keep vaccines and treatments effective against new variants until collective immunity is reached, the agency's chief said on Sunday.
The U.S. Centers for Disease Control and Prevention is stepping up efforts to track coronavirus mutations and keep vaccines and treatments effective against new variants until collective immunity is reached, the agency's chief said on Sunday.
Post a Comment
EmoticonClick to see the code!
To insert emoticon you must added at least one space before the code.