The virus may have been transmitted to the daughter through a shared towel, he said. Since genital warts have an incubation period of three weeks to nine months, the daughter might have contracted the virus before her mother showed any symptoms, he said. While genital warts are most often spread through sexual contact, they can also be transmitted “indirectly” at public facilities — such as toilets and saunas, he said. Typically, the HPV types that cause genital warts survive just two to three hours outside the human body, he said, adding that if the virus is in a warm and humid environment, it can survive more than a day. The HPV vaccine also lowers the risk of contracting the virus, he said.

Source: Taipei Times October 17, 2019 15:56 UTC