Some epidemiological data have implicated blood groups in susceptibility to coronavirus disease 2019 (COVID-19) infection. We were interested to see if there was any apparent effect of different ABO blood groups on susceptibility to COVID-19 infection in unvaccinated hemodialysis (HD) patients. as they had a high rate of mortality from this infection. Blood group O has been suggested ... https://pipingrockers.shop/product-category/tinnitus/