Re: another virus and genetic risk factors
The preference of bloodgroup A and Covid19 maybe due to a similar surface of A erythrocyte and the Corona Virus. O and B do not have this similarity therefore they see the Virus as an enemy from the first contact and react instantly whereas A thinks "they are friends". This might be an explanation why the infection in bloodgroup A might be more serious. ( the opinion of a specialist in Histopathology who worked in one Viennese hospitals, a very good one,) I just tell what she said.
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