HPV Info

HPV通过性接触传播并感染肛门和生殖器。

An HPV infection is caused by human papillomavirus, a DNA virus from the papillomavirus family, of which over 170 types are known. More than 40 types are transmitted through sexual contact and infect the anus and genitals. Risk factors for persistent HPV infections include early age of first sexual intercourse, multiple partners, smoking, and poor immune function.

HPV is typically spread by sustained direct skin-to-skin contact with vaginal and anal sex being the most common methods. Occasionally, it can spread from a mother to her baby during pregnancy. It does not spread via common items like toilet seats. People can become infected with more than one type of HPV. HPV only affects humans.

Human papillomavirus infection is an infection by human papillomavirus (HPV). Most HPV infections cause no symptoms and resolve spontaneously. In some people, an HPV infection persists and results in warts or precancerous lesions. The precancerous lesions increase the risk of cancer of the cervix, vulva, vagina, penis, anus, mouth, or throat. Nearly all cervical cancer is due to HPV with two types, HPV16 and HPV18, accounting for 70% of cases. Between 60% and 90% of the other cancers mentioned above are also linked to HPV. HPV6 and HPV11 are common causes of genital warts and laryngeal papillomatosis.

HPV is the most common sexually transmitted infection globally. Most people are infected at some point in their lives. In 2012, about 528,000 new cases and 266,000 deaths occurred from cervical cancer worldwide. Around 85% of these occurred in the developing world. In the United States, about 27,000 cases of cancer due to HPV occur each year. About 1% of sexually active adults have genital warts. While cases of warts have been described since the time of ancient Greece, their viral nature was not discovered until 1907.

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