That's Sage's site and was written with the help of her son-in-law, a microbiologist.

Virgo's right. You can't catch it from swapping spit. You can catch it from ingesting either infected feces or v*. (Ew, huh?) And don't let Ankitchen's reply scare you (no offense). There's no way for her to know how or where she caught the sv*.