"Even if someone has had HPV, they probably haven't been exposed to all of the strains covered by the vaccine," Einstein said.
Getting the vaccine, though, doesn't replace the need for screening, he said. It's still important to follow the screening guidelines because not all strains of HPV are covered by the vaccine.
The American Cancer Society has more on cervical cancer.
Learn about one woman's decision to get the HPV vaccine for the granddaughters in her care here.
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