Why are some severely stricken by the virus while others are asymptomatic?
Two studies this week published in Blood Advances suggests it may have to do with one’s blood type. People with blood type O seem to have a lowest risk of infection, while those with A and AB appear to have a higher risk of serious symptoms.
Researchers compared data from Denmark on 473,000 individuals who tested positive for COVID-19 to a control group of more than 2.2 million people which seems to support this.
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