What is STD?
STDs or sexually transmitted diseases are infections that get transferred due to sexual behavior such as vaginal intercourse, anal sex or oral sex in humans. IV needles, breastfeeding or childbirth has also been associated with the transmission of STDs.
VD (Venereal disease) or STI (Sexually transmitted infection) are other names by which it is known. The term infection is more appropriate than disease in this case because it is wider in meaning.