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

Context

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:

  1. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7276013/
  2. https://cen.acs.org/biological-chemistry/infectious-disease/Genetic-study-suggests-peoples-blood/98/i23
  3. https://www.medrxiv.org/content/10.1101/2020.05.31.20114991v1
  4. https://www.medrxiv.org/content/10.1101/2020.03.11.20031096v2
  5. https://onlinelibrary.wiley.com/doi/full/10.1111/bjh.16797
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How we grade evidence?

Learn more about it here.