Blood group A and B are observed to be significantly associated with Covid-19 susceptibility, whereas blood group O and AB have low risk of Covid-19 infection. Methods Following STROBE guidance for observational research, we explored the distribution of ABO blood group in patients hospitalized for acute COVID-19 and in those with Long COVID. Of the patients, 98.07 per cent were Rh positive. Background An association of ABO blood group and COVID-19 remains controversial. In the 2,586 Covid-19-infected patients, the frequencies of A, B, O, and AB were 29.93 per cent, 41.80 per cent, 21.19 per cent, and 7.98 per cent, respectively. Blood group having Rh - negative may protect against the risk of mechanical ventilation (intubation) and death (Zietz. The study was conducted on 2,586 Covid-19 positive patients tested through real-time PCR who were admitted at SGRH from Apto October 4, 2020. Vivek Ranjan, Co-author and Chairperson, Department of Blood Transfusion, at SGRH. The researchers found that type O blood was associated with a lower risk for COVID-19, while type A blood was associated with a higher risk. Therefore, larger, multicenter, and prospective studies are needed to ascertain the relationship between blood groups and SARS-CoV-2," Dr. They compared the ABO blood group distribution in 2173 patients with COVID-19 from 3 hospitals in Wuhan and Shenzhen, China, with that in the general population in those regions. "However, the ABO and/or Rh blood groups may not be responsible for this association, as these may indicate an unexplored underlying factor like co-morbidity. Further, the research found people with blood group A and Rh+ types are associated with a decrease in recovery period, whereas those with blood group O and Rh- could recover fast. Rashmi Rana, Consultant, Department of Research, SGRH, in a statement. Therefore, we investigated the association of ABO and Rh blood group with Covid-19 susceptibility, prognosis, recovery time, and mortality in this study," said Dr. "Severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) is a new virus, and it is unclear whether blood groups have any impact on Covid-19 risk or progression. The researchers also found that people with blood type A had a 45 percent increased risk of contracting the coronavirus and developing respiratory failure compared to people with other blood types. However, the study found no association between blood groups and susceptibility to severity of disease as well as mortality.
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