"CDC study says at least 1 in 4 teen girls has a sexually transmitted disease.15-24-year-olds account for half of all new STD infections. A venereal disease is a contagious disease that is typically acquired in sexual intercourse. VDs affect men and women of all backgrounds and economic level. VDs may not cause symptoms. A person who is infected may not know it and may give the infection to a sex partner. Men who have sex with men have higher rates of STDs. It is sexually transmitted disease; HPV most common.VDs cause more severe health problems for women, such as death from a tubal pregnancy and cancer of the cervix. VDs can spread from a pregnant mother to her newborn baby and cause serious problems or death.