That women in their 30s wouldn't have discussed the vaccine with their providers (or know about it's role in preventing cervical cancer) is partly explained by the fact that it it only recommended for women up through age 26, and I think (but might be wrong) that the original vaccine had and even narrower recommended age range.
Some of them might never have been in the age range recommended to get the vaccine. Hopefully those would be different numbers for women in their 20s.
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