Authorities change guidelines based on ‘what we know about the spread’ and protection from vaccination, as expert warns US ‘being hit by a viral hurricane’
US health authorities have halved, to five days, the recommended isolation time for people with asymptomatic Covid.
The US is facing a huge surge in Covid cases, fueled by the Omicron variant, which contributed to travel chaos over Christmas and stoked worries about damage to the economy and education.
