Sexually transmitted diseases
Sexually transmitted diseases or sexually transmitted diseases, also known as sexually transmitted diseases, refers mainly to sexual intercourse (including oral sex and anal sex, etc.) for the transmission of infectious diseases. STDs may have many causes: viruses, germs, fungi and parasites. In addition, some diseases can be transmitted through human sexual behavior, but not necessarily classified as sexually transmitted diseases, such as hepatitis B. In recent years also began to use sexually transmitted infections instead of sexually transmitted diseases, the former a wide range, a person may be infected, and may even be infected to other people, but there is no symptoms of any disease. Some sexually transmitted diseases are also shared by the needles when injecting drugs, transmitted to others, or transmitted to the next generation via production and breastfeeding. Sexually transmitted diseases are known for hundreds of years. STD is related to sexually transmitted diseases in medicine. ...