Sexually transmitted disease primary prevention

Overview
The most effective way to prevent sexual transmission of STIs is to avoid contact of body parts or fluids which can lead to transfer, not necessarily any sexual activity with an infected partner. (No contact equals no risk, not all sexual activities involve contact, like cybersex, masturbation from a distance, etc) Abstinence is one method of avoiding contact. Ideally, both partners should get tested for STIs before initiating sexual contact, or if a partner engaged in contact with someone else, but even then, certain STIs, particularly certain persistent viruses like HPV, may be impossible to detect with current medical procedures as they may be asymptomatic. Prevention is also key in addressing viral STIs such as HIV & herpes, as they are currently incurable. Many diseases that establish permanent infections can so occupy the immune system that other diseases become more easily transmitted.

The Innate immune system led by defensins against HIV can prevent transmission of HIV when viral counts are very low, but if busy with other viruses or overwhelmed, HIV can establish itself. Certain viral STI's also greatly increase the risk of death for HIV infected patients.