Vehicles pass through the tolls at the Golden Gate Bridge in San Francisco, Calif., on Monday, February 24, 2014. Tolls may rise by $1 in April and another $1 over the next four years. Vehicles pass through the tolls at the Golden Gate Bridge in San Francisco, Calif., on Monday, February 24, 2014. Tolls may rise by $1 in April and another $1 over the next four years. The current toll prices are shown at the Golden Gate Bridge in San Francisco, Calif., on Monday, February 24, 2014.
Yes, cervical cancer is a sexually transmitted disease (STD). We now know that cervical cancers are caused by the human papillomavirus (HPV), although risk factors like smoking, weakened immune system, age over 40, and lack of regular pap tests do contribute.
Zur Hausen postulated and analyzed a possible role of HPV in cervical cancer development. The first HPV types (HPV16 and 18) were isolated from cancer biopsies of the cervix and were cloned in 1983 and 1984, respectively [1] .Further epidemiological studies have confirmed that cervical infection by high-risk (HR) HPV types is the main risk factor for cervical cancer development.PV are contributing for 30% of all infection-associated cancers [4] . HPV are present in almost all of cervical cancer cases, with HPV16 and 18 accounting for 70% of cases.