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A study adds to evidence that people with type O or Rh*negative blood may be at slightly lower risk from the coronavirus.
Among 225,556 Canadians who were tested for the virus, the risk for a Covid-19 diagnosis was 12% lower and the risk for severe COVID-19 or death was 13% lower in people with blood group O versus those with A, AB, or B, researchers reported in Annals of Internal Medicine.
Our next study will specifically look at such antibodies, and whether they explain the protective effect,” Ray said.