The Centres for Disease Control and Prevention (CDC) has shortened the minimum amount of time people have to quarantine after a potential COVID-19 exposure from 14 days to as few as 7 days.
The new guidance says that people can come out of quarantine after 7 days postexposure if they have no symptoms and have a negative PCR or antigen test result; the specimen for testing may be collected as early as day 5. Without a test, people can end their quarantine at 10 days if they still have no symptoms. The agency says that 14 days is still optimal.
In addition, the agency has released new travel guidance in advance of the holidays. In short, the CDC recommends postponing winter travel. But people who do choose to travel should consider getting a COVID-19 test 1–3 days before travelling and another test 3–5 days after travelling. They should limit their non-essential activities for 7 days after travel, even if they test negative. If they do not get tested, nonessential activities should be restricted for 10 days.