A study found that rates of cervical lesions, in young women, were reduced between 2008 and 2012, in the United States. These were results a few years after HPV vaccination was introduced in this country. The study was conducted by the Centers for Disease Control. Researchers say that the vaccine is probably effective, however, changes in cervical screening in 2012 may be responsible as well.
Precancerous cervical lesions are changes in the cervical tissue. Because they are abnormal, they can easily become cancerous. Because they don’t cause any symptoms, it is hard to detect them. But, cervical screening can detect them. 50% of precancerous cervical lesions are caused by the HPV (types 18 and 16). HPV stands for human papillomavirus. They can be prevented with the HPV vaccination.
The HPV vaccine, was approved by the FDA (US Food and Drug Administration) in 2006. This vaccine protects people from HPV types 6, 11, 16 and 18. It is known that it can cause genital warts. The first vaccine, approved was Gardasil. In 2009, Cervarix, another HPV vaccine that should protect you from HPV (types 16 and 18) was approved. According to the CDC (Centers for Disease Control and Prevention), girls aged 11-12 must receive three HPV vaccine doses. Also, women aged 13-26, who were not vaccinated should receive the vaccine.
In this study, Dr. Susan Hariri set out to estimate high-grade cervical lesions rates among women aged 18-39 in the US. The chosen period was between 2008 and 2012. All women were part of the HPV-IMPACT Project. Also, these women were from: Oregon, New York, California and Connecticut. The high-grade cervical lesions rates were reduced in all states.