AUSTIN, Texas -- Four years ago, Republican Gov. Rick Perry put aside his social conservative bona fides and signed an order requiring Texas girls to be vaccinated against HPV.

The human papillomavirus is a sexually spread virus that can cause cervical cancer, and he says his aim was protecting against that. But it didn't take long for angry conservatives in the Legislature to override a measure that they thought tacitly approved premarital sex, and for critics to accuse Mr. Perry of cronyism.

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