Research has confirmed that precum does indeed carry HIV. Whether precum carries enough HIV to cause infection is a research question that needs to be studied further. This said, a study was conducted in which examined the efficacy of delayed condom application in preventing HIV transmission among a population of gay and bisexual men.
Only certain body fluids—blood, semen (cum), pre-seminal fluid (pre-cum), rectal fluids, vaginal fluids, and breast milk—from a person who has HIV can transmit HIV. These fluids must come in contact with a mucous membrane or damaged tissue or be directly injected into the bloodstream (from a needle or syringe) for transmission to occur.
HIV Transmission Only five body fluids can contain enough HIV to infect someone: blood, semen (including pre-cum), rectal fluid, vaginal fluid, and breast milk. HIV can only get passed when one of these fluids from a person with HIV gets into the bloodstream of another person—through broken skin, the opening of the penis or the wet linings of.