BBC News
December 28, 2021
US health officials have halved the recommended isolation time for people with asymptomatic Covid-19 from 10 to five days, amid a surge in cases.
The measure is expected to alleviate disruption caused by staff shortages in many areas because of infections.
The Centers for Disease Control (CDC) says most transmissions happen in the two days before and three days after symptoms develop.
But experts have criticised the lack of testing requirements to end isolation.
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