Scientists are trying to explain the link between different blood groups and COVID-19. Blood groups or blood types are defined by the proteins and sugar molecules that are present on the surface of red blood cells. The most well-studied blood groups are: A, B, AB, and O categories with addition of + or – for Rh factor.
Promising research shows that blood type may play a role in the development of COVID-19 requiring intensive care in hospitals.
Dr. Devine et. al., conducted a study to look at patients critically ill with COVID-19 in the intensive care units of two major Vancouver hospitals. It was found that individuals with blood group A or AB are more likely to have a severe COVID-19 infection, requiring more days in the hospital, and are more likely to be put on a ventilator when in the ICU, as compared to people with blood type B or O.
Moreover, a Danish study showed that individuals with type O blood were less likely to test positive for COVID-19 than individuals with other blood types. Both studies were published in the journal blood advances.
Many theories are already being discussed as to why individuals with certain blood groups or types (mainly blood type O) might have a competitive advantage against the COVID-19 infection. But, more research needs to be done to understand this phenomenon better.
By: Maniza R –Science WeeklyFix