![]() ![]() ![]() Of the patients, 98.07% were Rh positive. Results: In the 2,586 COVID-19-infected patients, the frequencies of A, B, O, and AB were 29.93%, 41.80%, 21.19%, and 7.98%, respectively. Data was analyzed using chi-square test, odds ratio, and Mann–Whitney test to determine the association of blood groups. Patients were enrolled from Apto October 4, 2020. A total of 2,586 real-time PCR (RT-PCR)-confirmed coronavirus disease 2019 (COVID-19) patients were recruited. We investigated the association of ABO and Rh blood groups with susceptibility to coronavirus disease 2019 infection, severity of disease, recovery period, and mortality of patients. Methods: This is a single-center, retrospective study conducted at Sir Ganga Ram Hospital, Delhi. ![]() Studies have shown association of blood groups A and O with higher and lower odds for coronavirus disease 2019 positivity, respectively. 2Department of Blood Transfusion Medicine, Sir Ganga Ram Hospital, New Delhi, Indiaīackground: ABO and Rh blood group systems are associated with many diseases including cancerous, infectious, non-infectious, bacterial and viral diseases.1Department of Research, Sir Ganga Ram Hospital, New Delhi, India.Rashmi Rana 1*†, Vivek Ranjan 2† and Naveen Kumar 1†
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