Research suggests that blood group A is more susceptible to COVID-19 than other blood groups, but it requires further validation and evaluation.
Clinical associations have also been reported for hypertension, diabetes, and other obesity-related and cardiovascular disease traits. Still, the relative role of clinical risk factors in determining the severity of COVID-19 has not yet been clarified. The frequency of blood groups A, B, O, and AB among the dead cases due to COVID-19 infection was estimated at 40%, 23%, 29%, and 8%, respectively.
The findings published in The New England Journal of Medicine said that genomewide association analysis could allow for the identification of potential genetic factors involved in the development of COVID-19. However, peer-reviewed research and monitoring from other parts of the world are necessary to verify whether various blood types affect the risk of severe COVID-19 infection.
The COVID-19 pandemic has given rise to a lot of potentially dangerous misinformation. For reliable advice on COVID-19 including symptoms, prevention and available treatment, please refer to the World Health Organisation or your national healthcare authority.