Have vaginal, anal, or oral sex with someone who has an STI and is not using protection
Share needles or syringes with someone who has an STI
Have skin-to-skin sexual contact with an infected person
Come into contact with infected blood or bodily fluids
Share sex toys without cleaning them or using condoms on them
Have sex with multiple partners without testing or protection
Have sex while one or both partners have untreated STIs
Be exposed during childbirth if the birthing parent has an STI