Efficacy of convalescent plasma according to blood groups in COVID-19 patients

In our study, it was observed that the efficiency of CP without anti-A antibody was lower than that of plasma containing anti-A antibody, although it was not statistically significant. This result is thought to be due to the anti-A antibody’s ability to block the ACE2 receptor. We believe that this hypothesis should be investigated in controlled studies with higher patient numbers.