Health care workers arrive for duty at Dongsan Medical Centre in Daegu, South Korea. The city has seen a number of cases of recovered coronavirus patients testing positive again. Photo: AP
Health care workers arrive for duty at Dongsan Medical Centre in Daegu, South Korea. The city has seen a number of cases of recovered coronavirus patients testing positive again. Photo: AP

Poor immunity or mutations? South Korea investigates ‘shrewd’ coronavirus as reinfections creep up

  • 141 South Koreans have retested positive for Covid-19. While it’s a small fraction of recovered patients, it raises doubts about developing a vaccine
  • Health experts say this could be from reinfection, reactivation after being dormant, or simply mass testing picking up remnants of the virus in patients

Health care workers arrive for duty at Dongsan Medical Centre in Daegu, South Korea. The city has seen a number of cases of recovered coronavirus patients testing positive again. Photo: AP
Health care workers arrive for duty at Dongsan Medical Centre in Daegu, South Korea. The city has seen a number of cases of recovered coronavirus patients testing positive again. Photo: AP
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