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HPV is a group of more than 200 related viruses, which are designated by a number for each virus type. [10] 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]
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.
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.
Cervical intraepithelial neoplasia (CIN) means the development of abnormal cells on the surface of the cervix. It is caused by an HPV infection but in most cases it is resolved by the immune system. However a small percentage of people might develop a more serious CIN which, if left untreated, can develop into cervical cancer.
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To reduce the risk of cervical cancer deaths, Siegel recommends getting the Pap test and the HPV vaccine, as well as the removal of any precancerous lesions found during screening.
HPV vaccines, developed in the early 21st century, reduce the risk of developing cervical cancer by preventing infections from the main cancer-causing strains of HPV. [2] The conduit of the cervix is the organ that allows for blood to flow from a woman's uterus and out through her vagina at menstruation, which occurs in the absence of pregnancy.
A pregnancy test is used to determine whether a female is pregnant or not. The two primary methods are testing for the female pregnancy hormone (human chorionic gonadotropin (hCG)) in blood or urine using a pregnancy test kit, and scanning with ultrasonography. [1] Testing blood for hCG results in the earliest detection of pregnancy. [2]