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reinfected


Healthy, young volunteers who have previously had COVID-19 will be deliberately exposed to coronavirus for a second time to see how the immune system responds, as part of a new U.K. study. Researchers at the University of Oxford on Monday launched the “human challenge” trial to investigate what happens when volunteers who have recovered from the …

One of the first confirmed cases of reinfection with the South African coronavirus variant has been reported in France in a study published on Wednesday in the Clinical Infectious Diseases journal. The subject of the case was a 58-year-old patient with a history of asthma who was found to have been infected with the South …

The same has been recorded in China, where some coronavirus patients tested positive after seeming to recover, although there are no official figures. In South Korea, the proportion of cases that retest positive is low — of the 7,829 people who have recovered from coronavirus there, 2.1% retested positive, the KCDC said Friday. It is …