Internal medicine

Disease

Coronavirus disease 2019 (COVID-19)

Infectious disease (medical specialty)

ABO blood group system

Immunology

Medicine

Clinical Infectious Diseases

To explore any relationship between the ABO blood group and the COVID-19 susceptibility, we compared ABO blood group distributions in 2,173 COVID-19 patients with local control populations, and found that blood group A was associated with an increased risk of infection, whereas group O was associated with a decreased risk.

Relationship between the ABO Blood Group and the COVID-19 Susceptibility.