Researchers in Hong Kong reported the first confirmed case of a person being reinfected with COVID-19. In April, a 33-year-old man recovered from the virus, but after returning from Spain, he tested positive a second time but was asymptomatic during his second infection.
According to researchers, the genetic sequencing showed the virus strains were different in the two months, which brings concern because this means that immunity to COVID-19 may only last a few months in some people.
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