Use a comma to separate nonessential elements from a sentence. More specifically, when a sentence includes information that is not crucial to the message or intent of the sentence, enclose it in or separate it by commas.
Genital warts are a sexually transmitted infection (STI) caused by certain strains of the human papillomavirus (HPV). These skin growths can cause pain, discomfort, and itching. They are especially dangerous for women because some types of HPV can also cause cancer of the cervix and vulva.
Genital warts are a sexually transmitted disease (STD) caused by the human papillomavirus (HPV). The warts are soft, moist, pink, or flesh-colored bumps. You can have one or many of these bumps. In women, the warts usually occur in or around the vagina, on the cervix or around the anus. In men, genital warts are less common but might occur on the tip of the penis. You can get genital warts during oral, vaginal, or anal sex with an infected partner. Correct usage of latex condoms greatly reduces, but does not completely eliminate, the risk of catching or spreading HPV. HPV vaccines may help prevent some of the HPV infections that cause genital warts.