Ross Clark Ross Clark

The curious case of the man who caught Covid twice

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Does catching the SARS-CoV-2 virus give us immunity from further infection by the virus or can we catch it a second time? The question has been given extra poignancy this week following Donald Trump’s tweet on Sunday, quickly censured by Twitter, claiming that he was immune. Before that row has had a chance to die down, a paper emerges in the Lancet Infectious Diseases reporting the possible reinfection of a 25-year-old man in Washoe County, Nevada.

The timeline reported in the paper, by the university of Nevada, is as follows. The patient first developed symptoms – sore throat, cough, headache, nausea, diarrhoea – on 25 March. He tested positive for the virus at a community testing facility on 18 April. By 27 April, his symptoms had disappeared. He then tested negative on 9 May and 26 May.

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