Blood type O least vulnerable to Covid; A, AB at most risk

Grant Boone
October 18, 2020

All things considered, 4.5 less days in the intensive-care unit than those with Type An or AB blood. However, experts agree more research is needed and these studies do not allow people with certain blood types to disregard pandemic safety precautions. One observed the 95 critically sick COVID-19 patients at hospitals in Vancouver, Canada, from February to April. After controlling for certain factors, they found fewer patients with blood type O, compared with patients with blood types A, B, and AB. The interesting observation made in this study was that the patients with the blood group A and AB required more of the mechanical ventilation, as compared to the blood group O. Similar was the case with patients being admitted in the ICU.

Scientists have developed, for the first time, a score that can accurately predict which patients will develop a severe form of Covid-19.

When blood group O was excluded, no significant difference was seen among A, B, and AB. Patients with Type An or AB, then, were likewise bound to require dialysis, a system that enables the kidneys to channel poisons from the blood.

Both new observations came out Wednesday in the journal Blood Advances. Of those, 38.4 percent had blood type O, while other research indicates that blood type makes up about 41.7 percent of the population. A 2005 Clinical Microbiology Review also found that most individuals infected with SARS had non-O blood types.

Recent reports have suggested that ABO blood groups might play a role in the infection, with a lower than expected prevalence of blood group O individuals among patients.

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Anyone with blood type O negative are universal donors as in they can donate their blood to all groups.

The new studies about blood type and coronavirus hazard line up with earlier research on the point. A study published in July looking at patients in five major hospitals in the state of MA found that people with blood type O were less likely to test positive for COVID-19 than those with other blood types.

And in March, an investigation of more than 2,100 coronavirus patients in the Chinese urban areas of Wuhan and Shenzhen likewise found that individuals with Type O blood had a lower danger of disease.

Despite all this, Mypinder Sekhon, a co-author of the Vancouver research, said that the link is still insubstantial.

But the blood group is not a preferable criterion to assess the risk of an individual patient. "And even if you're blood type O, you're not free to go to the pubs and bars".

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