| http://www.w3.org/ns/prov#value | - The vaccine has the most effect when it is given to girls who have not had any sexual encounters,??? the researcher said.She says the vaccine is 93 percent effective for girls who are vaccinated at age 10 to 13, whereas the effect is about 70 percent for young women aged 14-17.???Cell changes are a precursor to cervical cancer, but some types of HPV virus also lead to genital warts.
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