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Some HPV types, such as HPV5, may establish infections that persist for the lifetime of the individual without ever manifesting any clinical symptoms. HPV types 1 and 2 can cause common warts in some infected individuals. [18] HPV types 6 and 11 can cause genital warts and laryngeal papillomatosis. [1] Many HPV types are carcinogenic. [19]
Papillomaviridae is a family of non-enveloped DNA viruses whose members are known as papillomaviruses. [1] Several hundred species of papillomaviruses, traditionally referred to as "types", [2] have been identified infecting all carefully inspected mammals, [2] but also other vertebrates such as birds, snakes, turtles and fish.
HPV infects the squamous epithelium, usually of the skin or genitals, but each HPV type is typically only able to infect a few specific areas of the body. Many HPV types can produce a benign growth, often called a "wart" or "papilloma", in the area they infect. [10] Many of the more common HPV and wart types are listed below.
The highest-risk types are HPV 16 and 18; these are responsible for the vast majority of HPV-related cancers, including cancers of the cervix, vagina, vulva, penis, anus, and head and neck.
They’re mostly caused by HPV strains 2 and 4, although they’ve been linked to a number of other types of HPV, including 1, 3, 7, 27, 29 and 57, per Cleveland Clinic. Flat warts can also appear ...
Warts come in a lot of shapes, sizes and types, Dr. Turegano says, and can feel rough or smooth to the touch and even have "finger-like projections." Related: Does HPV Go Away On Its Own?
Genital HPV infections have an estimated prevalence in the US of 10–20% and clinical manifestations in 1% of the sexually active adult population. [29] US incidence of HPV infection has increased between 1975 and 2006. [29] About 80% of those infected are between the ages of 17 and 33. [29]
Nearly 1 in 3 men have at least one type of HPV. But the burden of screening for this widespread STI is on women. Experts explain why.
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