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Good news if you have blood group A

An new study in a letter in JAMA is reassuring news for those many people – me, as a start – who have had added anxiety during this pandemic – nearly from the start of it – by the many published studies, including a worrisome early one from China, that implied that people with blood group A had a significantly increased susceptibility to SARS-CoV-2 infection while people with blood group O had a reduced susceptibility to SARS-CoV-2 infection.

But this huge American study (over 11,000 cases) from a health care system of 24 hospitals and 215 clinics in the western US has concluded that “important associations of SARS-CoV-2 and COVID-19 with ABO groups are unlikely”.

In other words, if there is an association of blood group with risk for SARS-CoV-2 infection, it’s likely to be pretty insignificant, and surely much less important (this is my editorial 2 cents-worth) than the much more important risks such as social distancing and mask-wearing.