HPV can be contracted through sexual transmission, indirect transmission, mother-to-child transmission and skin-to-mucous membrane contact. 1. Sexual transmission: direct sexual contact with a person who has warts causes the warts in the genital area to rupture and cause the virus to shed, which is then planted directly on the partner’s genitals and causes infection. 2. Indirect transmission: through contact with supplies carrying the HPV virus, such as underwear, bathtubs, bath towels, toilets and so on. 3. Mother-to-child transmission: Pregnant women carrying HPV on their cervix can transmit the infection to their newborns through the birth canal. 4. Skin and mucous membrane contact: HPV can also induce corresponding tumors by infecting other parts of the body such as mouth, throat and skin. Infection with HPV should be examined and treated in hospital in time.