One area of research was whether blood types and naturally occurring antibodies could influence the spread or severity of infection.
But research has shown that blood types could also play a role in infection and how the body’s immune system responds.
One theory is that blood group antigens can act as binding receptors which will allow viruses or bacteria to attach and enter the body’s cells.
Researchers showed that the virus could express antigens on its surface similar to those found in the ABH blood group.
As we get to know more about SARS-CoV-2 the role of blood types, if any, may become clearer.

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