Coronavirus risk lowered for this blood type, studies suggest

A screenshot from Oren Liebermann's package about an Israeli group that is taking advantage of lockdown to clean one of the country's rivers

A screenshot from Oren Liebermann's package about an Israeli group that is taking advantage of lockdown to clean one of the country's rivers

There again, it was observed that of all blood group types, blood type O (positive or negative) was the most "protected" ones of all.

Among the Covid-19 positive, they found fewer people with blood type O and more people with A, B, and AB types. "We have the advantage of a strong control group - Denmark is a small, ethnically homogenous country with a public health system and a central registry for lab data - so our control is population-based, giving our findings a strong foundation".

A growing body of evidence suggests those who have blood type O may be less likely to contract coronavirus and typically experience less severe symptoms when they do come down with the illness. People with O-blood are also capable of donating red blood cells to any other type.

Which blood types put coronavirus patients in danger?

In the first, researchers looked at some 473,654 people in Demark who were tested for COVID-19 between February and July and compared them with the general population of roughly 2.2 million people.

The second study from Vancouver, Canada on 95 critically ill COVID-19 patients in a hospital found that-after adjusting for sex, age, and comorbidities-patients with blood types A or AB were more likely to require mechanical ventilation than patients with types O or B (84% vs 61%, P = 0.02), indicating higher rates of lung damage.

A total of 38 patients had blood types A or AB, and 57 had blood types O or B.

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While it's still not clear whether this link is a direct cause-and-effect relationship or simply a coincidental correlation, the two new bits of research further builds on the idea that blood type might have some role in how Covid-19 affects people.

People with blood groups "A" or "AB" appear to exhibit greater Covid-19 disease severity than people with blood groups "O" or "B", according to a separate retrospective study.

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 second research is based on almost 95 people from Vancouver, Canada who had tested positive for the virus.

Types A and AB also needed a sort of dialysis that helps the kidneys filter blood without putting too much pressure on the heart more often than their counterparts. The unique part of this study is the focus on the severity effect of blood type on COVID-19.

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