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

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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.

Researchers also found the blood type A or AB group had longer stays in the intensive care unit, a median of 13.5 days, compared to the other group with blood type O or B who had a median of 9 days.

The researchers did not find any significant difference in rate of infection between A, B, and AB types. Another recent study asked 120 people who were hospitalized with Covid-19 in France how they felt over 100 days after being first admitted, concluding that many were suffering from fatigue (55 percent), hard breathing (42 percent), loss of memory (34 percent), lack of concentration (28 percent), and sleep disorders (30 percent). Of those, only 38.4% had blood type O - despite people with that blood type making up 41.7% of the roughly 2.2 million untested people in the population. The findings also reveal patients across different ethnic groups continue to show fewer infections if they have O blood.

In general, your blood type depends on the presence or absence of proteins called A and B antigens on the surface of red blood cells - a genetic trait inherited from your parents. However, people who have blood types A and AB are the most vulnerable to the infection. It's the most common blood type: About 48 percent of Americans have Type O blood, according to the Oklahoma Blood Institute.

Lead author of the study, Dr Mypinder Sekhon, of the University of British Columbia, said: "The unique part of our study is our focus on the severity effect of blood type on COVID-19". After controlling for certain factors, they found fewer patients with blood type O, compared with patients with blood types A, B, and AB.

In two of such researches, the scientists have found out that a person's blood type can play a very important role in one's vulnerability towards the novel coronavirus. A 2005 study in Hong Kong found that most individuals infected with SARS had non-O blood types. "And if you're blood group O, you're not free to go to the pubs and bars".

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