Answer:
HPV
Step-by-step explanation:
An STI, also similarly regarded as an STD or sexually transmitted disease/infection, is, as the name suggests, often transmitted sexually through certain fluids that may be exchange or transmit from the male or female genitalia.
According to CDC.gov, a site that specializes in std related diseases and conditions, Human Papillomavirus is the most commonly spread one in the U.S (America)
HPV can cause cancers in the forms of warts in the male genitalia, and cervical cancer in women,
While HPV can be treated, there is currently no known cure.
Some preventable precautions would be: abstinence (lack of intimacy) and protection in all of its forms, most notably condoms.