Is it possible for a woman to get a high-risk cancer-causing strain of hpv from wearing someone else's unwashed, recently worn underwear if that someone is infected with those high-risk strains?

Get HPV vaccine: You are unlikely to get the virus from clothes. Have a healthy diet, exercise 30 minutes/day, drink plenty of water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. For nutrition: http://www.choosemyplate.gov/. Safe sex: https://www.hopkinsmedicine.org/health/wellness-and-prevention/safer-sex-guidelines Get HPV vaccine. Wish you good health!