Interestingly, blood groups, A and AB were also associated with complications post-hospitalization, such as myocarditis, lung injury and renal damage. It was observed that people with blood types A or AB were more likely to require mechanical ventilation and oxygen support post COVID infection. The researchers also noted that people with blood types A and AB did not have longer overall hospital stays. However, they remained in the intensive care unit (ICU) for longer on average.
Another study, done in Spain compared the outcomes of 1900 severely ill COVID+ patients with 2000 healthy, non-sick patients. There again, it was observed that of all blood group types, blood type O (positive or negative) was the most ‘protected’ ones of all. Similar rates of infection were also present for other signs. For those who were inflicted by the virus, type A was 38 per cent, type B was 26 per cent, type AB was 10 per cent, and type O was 25 per cent.