BBCNEWS BBC News December 28, 2021 21:10:00
To meet in private. us health authorities have halved the recommended isolation period for people who test positive for covid but don't exhibit symptoms. they've previously warned of a half a million cases a day in the coming weeks as the omicron variant takes hold. that isolation time goes from ten to five days. officials insist this is being guided by the science. so, why is this step being taken now? we put that question to david edwards, an aerosol scientist and a harvard university professor and bioengineer. he was explaining what that significance would be. dr michael mina is the chief s...