It seems that the 263 South Korean patients had not been reinfected at all
A week ago, the World Health Organization issued a warning which, if it were true, would constitute the most depressing-yet development in the story of COVID-19. It said that there was ‘no evidence’ that people who have already been infected with the disease, and who have developed antibodies as a result, have gained any immunity from further infection. The warning seemed to tally with news from South Korea that 263 people who had already had the disease appeared to have become reinfected. If antibodies to SARS-CoV-2 — the virus which causes COVID-19 — do not prevent you from further infection it would suggest that we could never develop herd immunity from the disease. Moreover, waiting for a vaccine is likely to prove a fruitless exercise.
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