The ones "everyday people" are likely to come into contact with are:
What are your concerns?
So we associate this type of transmission with HIV, and just assume that it's passed on the same way.
What we know about kissing:
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You can relax.
Saliva contains proteins and a low salt content that actively reduce its infectiousness.
Contact between broken skin, wounds, or mucous membranes and HIV-infected blood or blood-contaminated body fluids.