The US Centers for Disease Control and Prevention today shortened the recommended times that people should isolate when they've tested positive for Covid-19 from 10 days to five days if they don't have symptoms -- and if they wear a mask around others for at least five more days.

The CDC also shortened the recommended time for people to quarantine if they are exposed to the virus to a similar five days if they are vaccinated. People who are fully vaccinated and boosted may not need to quarantine at all, the CDC said.

"Given what we currently know about COVID-19 and the Omicron variant, CDC is shortening the recommended time for isolation from 10 days for people with COVID-19 to five days, if asymptomatic, followed by five days of wearing a mask when around others," the CDC said in a statement.

People whose symptoms are getting better may also leave their homes after five days so long as their symptoms are improving, the CDC said. People who have a fever should stay home until the fever clears up, the CDC added.