Study Shows No Link Between Gardasil And Blood Clots

July 8, 2014 8:34 PM

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One worry that has been raised about Merck’s Gardasil vaccine, for the human papilloma virus that causes cervical cancer, is that it might be causing an increased risk of blood clots, which can be deadly. But it’s difficult to know for sure whether a clot was caused by the vaccine, in part because they can occur in young woman without cause and in part because oral contraceptives raise the risk of clots, also known as venous thromboembolism or VTE.

Researchers led by Nikolai Madrid Scheller of the Department of Epidemiology Research, Statens Serum Institut, Copenhagen used Denmark’s medical record system to search for a signs of whether the vaccine raised the risk of clots. They were able to examine a database of 1,613,798 women. Four-thousand...

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