Does blood type affect coronavirus 2019 (COVID-19) severity?

Updated: Jun 25, 2021
  • Author: David J Cennimo, MD, FAAP, FACP, FIDSA, AAHIVS; Chief Editor: Michael Stuart Bronze, MD  more...
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Type A blood has been suggested as a potential factor that predisposes to severe COVID-19, specifically in terms of increasing the risk of respiratory failure. Blood type O appears to confer a protective effect. [91, 92]  

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