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Your Risk of Blood Clots Is High for the First Year After You Have COVID-19, Study Suggests - Prevention Magazine

Your Risk of Blood Clots Is High for the First Year After You Have COVID-19, Study Suggests - Prevention Magazine

Sep 22, 2022 1 min, 34 secs

By now, most people are aware of the risk of developing long COVID after having COVID-19.

But new research suggests the virus can ramp up your risk of developing blood clots—and that risk stays higher than normal for a year afterward.

The researchers discovered that, in the first week after someone received a COVID-19 diagnosis, the risk of developing an arterial blood clot (which can lead to a heart attack or stroke by blocking blood flow to the heart or brain), was nearly 22 times higher than in someone who didn’t have the virus.

The risk dropped by the second week, but was still elevated—it was less than four times higher than in someone who didn’t have the virus.

For clots that happen in the veins, like deep vein thrombosis and pulmonary embolism, the risk in the first week after being diagnosed with COVID-19 was 33 times higher.

After three to four weeks after a person had been diagnosed, it was about eight times higher.

The risk was still 1.8 times higher between 27 and 49 weeks later when compared to people who had never had COVID-19.

The overall risk of developing an arterial clot in the 49 weeks after being diagnosed with COVID-19 was 0.5% and it was 0.25% for a venous clot in that time period.

It’s also possible that an increased risk of blood clots is simply how the virus works, says Thomas Russo, M.D., professor and chief of infectious disease at the University at Buffalo in New York.

Russo says that doctors have known “from the beginning of this pandemic that when you get infected with COVID,” you have a greater tendency to form blood clots.

Doctors say that other infections can cause a higher-than-usual risk of blood clots.

Russo says it’s still a good idea to at least be aware of the risk for blood clots and what symptoms can look like?

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