Experts have long argued that such travel restrictions are ineffective and harmful.
CDC draws criticism for shorter COVID quarantine, isolation as omicron bears down
Data backs shorter periods, but experts say testing is key.
Omicron found in US—plus 23 other countries in 5 of 6 global regions
If we can’t defeat delta, we don’t stand a chance against omicron, WHO warns.
US preps vaccine contingencies amid panic over poorly understood omicron
Vaccines offer “at least some protection” against omicron, Biden believes.
After a COVID-free year, delta arrives in Wuhan, China
Delta is thought to have arrived in the country on a flight from Russia.