sexually transmitted diseases
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教育 | 2.3MB
説明
sexually transmitted infections STI, also referred to as sexually transmitted diseases STD and venereal diseases VD, are illnesses that have a significant probability of transmission between humans by means of human sexual behavior, including vaginal intercourse, oral sex, and anal sex. While in the past, these illnesses have mostly been referred to as STDs or VD, in recent years the term sexually transmitted infections STIs has been preferred, as it has a broader range of meaning a person may be infected, and may potentially infect others, without having a disease. Some STIs can also be transmitted via the use of IV drug needles after its use by an infected person, as well as through childbirth or breastfeeding. Sexually transmitted infections have been well known for hundreds of years.
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