Background: Since the outbreak of coronavirus disease-19 (COVID-19) research has been continued to explore multiple facets of the disease. The objective of the present study was to evaluate the relationship between blood group phenotypes and COVID-19 susceptibility. Methods: In this retrospective observational study 132 hospitalised COVID-19 patients were enrolled from the Swai Man Si... https://allfixelectricales.shop/product-category/stepdown-transformer/