In the first study, scientists in Denmark analyzed data from 473,654 people tested for the virus between February and July, CNN reported. Most results were negative, with just 7,422 tests returning positive. 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.
Blood type could be linked to severity of coronavirus infections, new studies says
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