According to a new study, blood type does not appear to affect susceptibility to COVID-19 in the United States. 

Investigators looked at data on around 108,000 people from Utah, Idaho, and Nevada tested for COVID-19, whose blood type was mentioned in their medical records. None of the blood types, be it A, B, AB or O, was tied to their risk of getting infected, need for hospital admission or intensive care, reported the study published in JAMA Network Open. 

Smaller studies from China, Italy and Spain have shown a link between type A blood and higher COVID-19 risks and type O blood and lower risks.A large study from Denmark also linked blood type to COVID-19 severity. 

However, studies from New York and Boston, like the new study, did not detect any such associations. According to study coauthor Dr. Jeffrey Anderson of the Intermountain Healthcare Heart Institute in Salt Lake City, the effects of blood type may differ across populations… (Reuters, April 17, 2021)