Analysis of ABO and Rh Blood Type Association With Acute COVID-19 Infection in Hospitalized Patients: A Superficial Association Among a Multitude of Established Confounders.

While type A blood appears to be weakly more prevalent with respect to B and AB types in hospitalized patients, strong confounders of age and sex dilute this significance. Rh-negative patients appear to have a higher mortality, although this too is strongly confounded. Overall, ABO and Rh blood types do not have a significant relationship with susceptibility and mortality with COVID-19 infection in our population.