Health
Those who test positive for COVID for 10 days or more
June 1, 2022-Some people are aware of long-term positive testing as Omicron submutants continue to cause an increase in COVID cases throughout the United States.
Antigen testing at home can return a positive result for 10 days, or even longer, up to 14 days. To New York Times.. Public health experts say it is difficult to understand what it means from a contagious point of view, as rapid testing does not always predict it accurately.
“Some people may not be infectious at the end of the course, even if they are antigen-positive, while others may be infectious, even if they are antigen-negative.” Jonathan Glad, MD ,, Immunologist An infectious disease expert at Harvard TH Chang Public Health School told the newspaper.
Rapid antigen test detects protein On the outside of coronavirus, Can accurately identify who has a high level of virus. Studies show that most people stop testing positive for these tests within 10 days of infection.
However, a group of growing people seems to have been testing positives for a longer time. This could mean that some people may be releasing virus particles for extended periods of time, or that the test is picking up the remaining virus debris as the infection weakens. Times report.
Several recent preprint studies that have not yet been peer-reviewed show that some people who have obtained the Omicron variant are more positive than previous strains and may spread the virus longer. I am.
of One analysis About 65% of people tested in California during the January Omicron wave were positive 5 days after the onset of symptoms or after the first positive test. For most people, it decreased the next day, but even on the 11th day, about 20% were positive.
of Another recent studySome people with Omicron infections in Massachusetts shed virus particles for over a week. About 25% had viral particles that were still viable after day 8.
yet Another studyMost participants, including Boston University vaccinated students and staff, no longer had positive virus cultures about 6 days after the onset of symptoms. However, 17% have since had a positive culture, with the latest being up to the 12th day.
The tricky side is that negative antigen testing appears to be a reliable indicator of negative virus cultures in the laboratory, but researchers have found that positive testing does not necessarily predict positive virus cultures. did.
“A negative test is a little reassuring, but a positive test isn’t particularly useful,” Dr. Tara Bouton, MD, a principal investigator and infectious disease specialist at Boston University School of Medicine, told the newspaper.
Researchers are now trying to understand why some people are positive over the long term. People with weak immunity tend to take longer to get rid of the virus, but some healthy, fully vaccinated people continue to test positive. In addition, people who have been exposed to coronavirus may take longer to get rid of the coronavirus, some tests are more sensitive than others, and people wipe their noses differently. The newspaper reported that it was likely.
Due to uncertainty, scientists are divided on what people should do if they test positive for more than 10 days.Some advocate continuous self-assertionisolation To prevent potential infections, and others have said long-term quarantine is unnecessary.
For example, a person with persistent or weakened immunity may continue to release viral particles for extended periods of time and should continue to be quarantined. Times report. In general, a healthy person who recovers can finish quarantine after 10 days, but he / she should continue to wear a suitable mask in public.
Overall, the test should be used as the last factor of infection, along with the patient’s symptoms and immune status. “We use rapid testing as a guide, but it’s not exhaustive,” Dr. Peter Chin Hong, MD, an infectious disease specialist at the University of California, San Francisco, told the newspaper.
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Sources 2/ https://www.webmd.com/lung/news/20220601/testing-positive-covid-10-days-or-longer The mention sources can contact us to remove/changing this article |
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