The people in the second group have this little health problem because they married someone from the first group.
With high probability, yes, though if the virginal sister in the documented case of transmission by clothing-sharing saves herself for marriage, she and her husband (if he, too lived up to the Christian ideal of chastity) would be counter-examples.
You are a little behind the times. On free republic I learned an amazing factoid about cervical cancer of the throat! Turns out the throat can store HPV and get cancer.
It is a lesbian disease and has nothing to do with fornication.
There was also a post describing the use of saran wrap to prevent transmission. I can’t remember what the procedure was called.