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.
Causes of genital warts. Genital warts are caused by the human papilloma virus (HPV). HPV is not a single virus, but a family of more than 100 different strains of viruses. However, most cases of genital warts are caused by two strains of the virus â type 6 and type 11.auses of genital warts. Genital warts are caused by the human papilloma virus (HPV). HPV is not a single virus, but a family of more than 100 different strains of viruses. However, most cases of genital warts are caused by two strains of the virus â type 6 and type 11.