Hpv how many kinds are there

Infection with high-risk HPV hrHPV types that are not cleared by the immune system can cause cervical cancers and a significant proportion of cancers of the anus, oropharynx, vagina, vulva and penis. HPV cancers take many years to develop. The 14 most cancer-causing HPV types include types 16, 18, 31, 33, 35, 39, 45, 51, 52, 56, 58, 59, 66 and However, not all infections with HPV 16 or 18 do progress to cancer. In addition, HPV 16 is strongly associated with anal cancer and throat cancer.

Current research indicates that high-risk HPV changes the host human cell but its growth needs additional triggers to cause cancer. Most HPV infections are transient and thought to clear naturally before they cause any health problems. HPV Strains. About HPV Virus.

The American Cancer Society estimates that more than 13, women in the United States will be diagnosed with cervical cancer in The human papillomavirus HPV is a common infection affecting 1 in 4 U. At this time, there isn't a cure for HPV, though its symptoms can…. Most sexually active men and women will have HPV at some point in their lives. About 40 types of HPV are sexually transmitted. In rare cases, HPV is a…. Many STDs can lead to infertility.

If you have human papillomavirus HPV , you may be wondering whether it has the same effect. Can you get HPV without genital warts? In fact, HPV often has with no symptoms at all and goes away on its own. Nearly all sexually active people…. Most sexually active people will have some strain at some point in their lives. Here's why HPV testing is important and what…. If you or your partner is diagnosed with HPV, you may have some questions.

What is it? How do I talk to my partner about it? Health Conditions Discover Plan Connect. Medically reviewed by Jill Seladi-Schulman, Ph. Common types of HPV. HPV infection may also cause more serious conditions, such as certain types of cancer.

A person can be infected with more than one HPV strain at a time. Strains are identified by number and fall into either of the following two categories. These strains have no association with cancer but can lead to genital warts. In addition to the vulva and the penis, warts may appear on the cervix or vagina in women, the scrotum in men, or in and around the anus in men or women.

Warts may also appear in the mouth and throat. Two strains of HPV, types 6 and 11, cause 90 percent of these warts. Only about 1 percent of sexually active Americans have noticeable genital warts, which require treatment to prevent the spread to other genital areas and to sexual partners. Some low-risk HPV strains can cause mild cervical dysplasia, abnormal changes in the cells on the surface of the cervix.

These changes are not precancerous.