HPV infection is caused by a virus.
More than 100
types of HPV have been found. Some types cause
genital warts and some can lead to
cervical cancer. Types 6 and 11 cause most genital
warts. Other types such as 16 and 18 are high-risk and can cause abnormal cell
changes on the cervix.
How the infection is spread (transmission)
spread by direct contact.
The virus can be spread to or from the
genitals, anus, mouth, or throat during sexual activities. But warts in the
mouth or throat are extremely rare. Condoms can lower your risk of getting
After the infection occurs, it may spread to other areas of
the genitals or to the anal area.
You can spread the virus even if
you do not have any symptoms of infection or any visible warts.
There is a small chance that a pregnant woman can pass the
virus to her baby.