It has been suggested that blood type determines the susceptibility level of COVID-19. This level of a vulnerability is based on observations of some COVID-19 patients and their relation to the ability to survive against COVID-19 virus infection
The information contained, group A was more at risk of coronavirus infection, and people with blood type O were considered to be more immune to this virus. This is based on research conducted in China.
Genetic analysis of Covid-19 patients shows that blood type may affect the severity of a person suffering from coronavirus infection. The scientists who compared the genes of thousands of patients in Europe found that those with type A blood tended to experience severe pain, while blood type O was less likely.