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'Reinfected' COVID-19 cases are false positives, South Korean study suggests
South Korean health authorities raised new concerns about COVID-19 after reporting last month that dozens of patients who had recovered from the illness later tested positive again, Reuters reported.
Experts took tests from dozens of patients with repeated positive COVID-19 tests. According to experts, these results are false-positive and are caused by the remaining SARS-CoV-2 particles in the body. Representatives of the Korea Centers for Disease Control and Prevention (KCDC) believe that these patients are not contagious to others.
Reverse transcriptional polymerase chain reaction (RT-PCR) tests are used in South Korea to determine the genetic material of COVID-19. This method is considered the most accurate to diagnose the virus. According to Seol Dai-wu, an expert in vaccine development at Seoul’s Chung-Ang Universit, in some cases, the tests may detect old particles of the virus, which may no longer pose a significant threat to the patient or others
South Korea had reported more than 350 such cases as of Wednesday.
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