Association between ABO blood types and the prognosis and mortality rates in patients with severe COVID-19 admitted in the intensive care unit of a tertiary-level hospital in Turkey.

ABO blood types carry different association risk factors for the prognosis of severe COVID-19 patients hospitalized in ICU. Specifically, blood group O was correlated with an increased risk of deterioration of respiratory status including intubation and elevation of laboratory findings whereas it did not affect the risk of increased mortality.