Published: Sun, October 18, 2020
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Your blood type may determine how sick you get from COVID

Your blood type may determine how sick you get from COVID

In the fight against novel coronavirus, scientists have developed a score that can accurately predict which patients will develop a severe form of Covid-19.

As per the observations made according to these data, they concluded that people who had blood type O were less vulnerable whereas people with A and AB were more at risk.

Since blood group distributions vary among ethnic subgroups, the researchers also controlled for ethnicity and maintained that fewer people with blood type O tested positive for the virus.

In this study, researchers analysed data from a Danish health registry that included more than 473 000 patients who were infected with Covid-19 between 27 February 2020 and 30 July 2020.

Anyone with blood type O negative are universal donors as in they can donate their blood to all groups. The findings also reveal patients across different ethnic groups continue to show fewer infections if they have O blood. They found that patients with blood groups A or AB were more likely to need mechanical ventilation, with 84 percent of A or AB patients requiring mechanical ventilation compared to 61 percent of O or B patients.

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".

Interestingly, blood groups, A and AB were also associated with complications post-hospitalization, such as myocarditis, lung injury and renal damage.

"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", Torben added.

The second study examined data from 95 critically ill people who were hospitalized with Covid-19 in Vancouver, Canada.

"The Dublin-Boston score is easily calculated and can be applied to all hospitalised Covid-19 patients", said study author Gerry McElvaney from the RCSI University in Ireland. Another study in April (pre-print and awaiting peer-review) found that among 1,559 coronavirus patients in New York City, a lower proportion than would be expected had Type O blood. 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.

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