London: According to new research, one in 10 people can still be infectious and potentially spread the covid virus even after a 10-day quarantine period.
The study, led by the University of Exeter in the UK, used a newly adapted test that could detect whether the virus was potentially still active. This was applied to samples of 176 people in Exeter who had tested positive on standard PCR tests.
The study, published in the International Journal of Infectious Diseases, found that 13 percent of people still exhibited clinical-relevant levels of the virus after 10 days, meaning they could potentially still be infectious.
Some people maintained these levels for as long as 68 days or for more than two months. The team believes that this new test should be implemented in settings where people are vulnerable, to prevent the spread of COVID-19.
“Although this is a relatively small study, our results suggest that potentially active viruses can sometimes persist beyond a period of 10 days, posing a potential risk of further transmission. Furthermore, these people There was nothing clinically noteworthy about them, which means we wouldn’t be able to guess who they were,’ said Professor Lorna Harris of the University of Exeter Medical School.
Conventional PCR tests work by testing for the presence of viral fragments. While they can tell if someone has recently had the virus, they cannot find out if it is still active, and the person is contagious.
The test used in the latest study however gives a positive result only if the virus is active and potentially capable of further transmission.
“In some settings, such as people returning to care homes after illness, people who remain infectious after ten days can pose a serious public health risk. We may need to ensure that those settings People in the U.S. have a negative active virus test to make sure people are no longer contagious. Now we want to do larger tests to test it, said lead author Marilyn Davis from the university.
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