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Blood Type May Play a Role in Covid-19 Severity - Type O blood linked to lower respiratory failure in study


A very early study of patients with Covid-19 in Wuhan and Shenzhen, China was among the first to suggest an association between blood type and SARS-CoV-2 susceptibility and disease severity. In that study, published ahead of peer review, the type A blood group appeared to be associated with a greater risk for acquiring Covid-19 and the type O blood group was linked to lower risk. Another early study involving cases in New York City, also published ahead of peer review, found a higher prevalence of group A blood type in patients who were SARS-CoV-2 positive and a lower prevalence of infection with group O blood type. And, preliminary data recently reported by the commercial genetic testing site 23andMe also suggested a protective role for type O blood type against the novel coronavirus when compared to other blood types. Blood specialist Parameswaran Hari, MD, of the Medical College of Wisconsin, said while the research suggesting a role for blood type in Covid-19 remains preliminary, the findings appear to be consistent. Hari was not involved with the newly published study, but he talked to BreakingMED about the findings. “The studies are all pointing in the same direction, and that is really intriguing,” he said.

Physician's Weekly - June 23, 2020

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