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Early in the pandemic, research showed that almost one-third of people with COVID-19 in intensive care experienced potentially fatal complications as a result of excessive blood clotting.

Another studyTrusted Source found that many of these patients had unusually “sticky” blood that tended to coagulate easily.

“As we learned about the connection between blood clots and COVID-19, we knew that aspirin — used to prevent stroke and heart attack — could be important for COVID-19 patients,” says Jonathan Chow, M.D., assistant professor of anesthesiology and critical care medicine at the George Washington University School of Medicine and Health Sciences in Washington, D.C.

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