Covid-19 twice found re-infection can occur swiftly and the second bout of illness can be more severe.The research, published in the Lancet medical journal, examined the case of a 25-year-old man living in Nevada who became infected with two different genetic variants of the SARS-CoV-2 virus in less than two months.
He tested negative twice in between, meaning he’s unlikely to have suffered a single prolonged infection.The findings come as U.S.
President Donald Trump says he’s immune to the virus after a single encounter. Any new findings on resistance can also have implications for a vaccine as drugmakers race toward the finish line.The degree of protective immunity after a Covid-19 infection is one of the pandemic’s great unknowns.So far.