South Korean health authorities raised new concerns about the novel coronavirus after reporting last month that dozens of patients who had recovered from the illness later tested positive again.
People wearing masks to avoid the spread of the coronavirus disease arrive at Gimpo international airport in Seoul, South Korea, May 1, 2020. REUTERS/Kim Hong-Ji
South Korea had reported more than 350 such cases as of Wednesday, according to the Korea Centers for Disease Control and Prevention .As more and more South Koreans were released from treatment for COVID-19, authorities discovered a disturbing trend. Some ostensibly cured patients were later testing positive again.
The RT-PCR process can quickly return results and is considered the most accurate way to find out if a patient is infected with the coronavirus. This so-called false positive result is likely behind the cases of recovered patients testing positive again, the KCDC says. Less than half of those retested by mid-April were showing symptoms, according to the KCDC, but authorities now say it is unlikely that those symptoms were being caused by the virus.Patients who tested positive for the new coronavirus after recovering from COVID-19 do not appear to be infectious.
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