- People with type O or Rh−negative blood may be at slightly lower risk from the new coronavirus, according to a new research.
- Among 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.
- People in any blood group who were Rh-negative were also somewhat protected, especially if they had O-negative blood. People in these blood type groups may have developed antibodies that can recognize some aspect of the new virus.