The Centres for Disease Control and Prevention (CDC) wants the isolation period for asymptomatic Covid-19 patients reduced to 10 days.
Initially, it recommended that people who test positive isolate until they had two negative swabs for the coronavirus, but an updated guide now advises most people with active cases of the virus to isolate for 10 days after the symptoms begin and 24 hours after their fever has broken.
In a move that is likely to change countries’ strategies on the pandemic and ease individual patients’ agony, the public health agency said that for most persons with Covid-19, isolation and precautions can generally be discontinued 10 days after the onset of the symptoms and resolution of fever for at least 24 hours, without the use of fever-reducing medications, and with the improvement of other symptoms.
The CDC reached the decision after a series of studies showed that the concentration of SARS-CoV-2, which causes Covid-19, declined drastically in the upper respiratory system after the onset of symptoms.
“It was estimated that 88 per cent and 95 per cent of specimens from patients with compromised immunity no longer yielded replication-competent virus after 10 and 15 days, respectively, following symptom onset,” it said.