October 1, 2010
The Gardasil vaccine protects against infection with HPV, the human papillomavirus, which causes cervical, vulvar and vaginal cancer as well as genital warts, reports Drugs.com. Gardasil was approved in 2006 and by May 2010, more than 29.5 million doses had been distributed in the U.S. There were more than 16,000 reports of side effects after vaccination to VAERS, the Vaccine Adverse Event Reporting System, a voluntary reporting system. Of these, 8 percent were serious. According to the CDC, medical experts reviewing these events have not found a common medical pattern suggesting they were caused by the vaccine.
Blood clots in the heart, lungs and legs have been reported after receiving Gardasil. According to the CDC, 90 percent of the people reporting blood clots had risk factors for them, including taking birth control pills, smoking, immobility or obesity.
For females, the incidence of blood clots reported with Gardasil is higher than those reported with other vaccines, according to the CDC, although no causal relationship has been established.