Symptomatic people who test positive should still isolate for a full 10 days, counting from the first day after symptoms develop
that halving the recommended isolation time “is motivated by science demonstrating that the majority of SARS-CoV-2 transmission occurs early in the course of illness, generally in the 1-2 days prior to onset of symptoms and the 2-3 days after.” The critical period for transmission are the first few days of infection, which is why the agency emphasizes quarantine and vigilant masking in that immediate period upon exposure or illness.
Some health experts have been calling for this kind of change for months, since shorter isolation and quarantine periods appeared to be sufficient to slow the spread, though others say the CDC’s updated guidelines are confusing to the public. Complicating matters, the new recommendations are “happening at a time when more people are testing positive for the first time and looking for guidance,” Lindsay Wiley, an American University public health law expert, told the.
Although the risk of spread may drop substantially after five days, it will not necessarily disappear for everyone, New York physician and spokesman for the Infectious Diseases Society of America Aaron Glatt told theCDC Director Walensky also toldthat changing the agency’s recommendations is an attempt to get ahead of other states that may also try to shorten their isolation and quarantine policies.
In the CDC statement, Walensky added that preventing infection and spread is the best pandemic strategy: “Get vaccinated, get boosted, wear a mask in public indoor settings in areas of substantial and high community transmission, and take a test before you gather.”Popular Science
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