Does blood type influence COVID-19?

In a Nutshell

  • Blood Group A is at higher risk of developing COVID-19 infection as well as more severe symptoms
  • Blood Group O is 9-18% less likely to get COVID-19
  • Regardless of your blood type, appropriate caution should be maintained to minimize the risk of contracting or transmitting this virus


An early study conducted by Chinese investigators suggested there was a link between blood type and COVID-19 risk.

Verdict -Does blood type influence Coronavirus?

Data published in the Annals of Hematology, dispels previous reports of any correlation between certain blood types and COVID-19.

The multi-institutional study did find that symptomatic individuals with blood types B and AB who were Rh positive were more likely to test positive for COVID-19, while those with blood type O were less likely to test positive. But disease severity is not dependent on blood type.

Nuances/ Safety

It is strongly recommended to practice utmost caution and care to prevent the spread of COVID-19 regardless of your blood type.

Strength of Evidence:A
Data presented in this article is supported by multiple large-scale studies published in peer reviewed journals.

Our Ruling

Blood type is not associated with a severe worsening of symptoms in people who have tested positive for COVID-19.

Our Sources:

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How we grade evidence?

Learn more about it here.