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Case of man reinfected with coronavirus stokes immunity fears – The Guardian

Hong Kong case leads scientists to doubt development of antibodies in previous patients, but other experts say it is no cause for alarm

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A young man has been diagnosed with coronavirus more than four months after he recovered from a first episode of the disease, suggesting that immunity to the virus can be short-lived and raising more questions about vaccines against Covid-19.
The case in Hong Kong is the first lab-confirmed reinfection. Genetic sequencing by scientists at the University of Hong Kong established that the second episode, in an otherwise healthy young man, was caused by a slightly different strain. Researchers had…

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