MIT Technology Review – “The news: A man in the US caught covid-19 for a second time in the space of just two months, according to a study published in The Lancet Infectious Diseases. That makes him the fifth person to have officially caught the coronavirus twice, after cases recorded in Hong Kong, Belgium, Ecuador, and the Netherlands (and there will certainly be more cases we don’t know about). However, what’s strange about his case is that he had had a worse bout of illness the second time. His doctors compared the genome of the virus during the two illnesses and found they were too different to have been caused by the same infection. There’s only one other recorded instance where this has happened—the case in Ecuador…”