Patients may have decreased factor VIII coagulant activity and von Willebrand factor levels.
Associated with lower risk of COVID-19.
People with type O blood are more likely to become infected with cholera bacteria.
It is suggested that patient with type O blood are more likely to become infected with the Helico pylori than people with type A or B blood because their gastric mucosa has more receptors for the bacterium.
In saliva the Norwalk virus binds more efficiently to O and A antigens but less to B antigens.
People who have blood types A, B, and AB are up to 82 percent more likely to develop cognition and memory problems, which can lead to dementia compared to those with Type O.