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A lucky few seem 'resistant' to Covid-19. Scientists ask why - STAT

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A small number of people may have won a sort of biological lottery — they appear to be naturally immune to the coronavirus that has killed more than 4 million people. But how?

H er husband collapsed just before reaching the top of the stairs in their small one-bedroom house in São Paulo, Brazil. Frantic, Thais Andrade grabbed the portable pulse oximeter she had purchased after hearing that a low oxygen reading could be the first sign of the novel coronavirus. Erik’s reading was hovering eight points lower than it had that morning. He also looked feverish. “When he hit 90% [on the oximeter], I said we can’t wait anymore,” Andrade recalled. “I called an ambulance.” Advertisement At the hospital that day in June 2020, a CT scan showed multiple lesions in her husband’s

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