You could become infected with HIV if:
Either or both are true:

You have unprotected anal or vaginal sex with someone who has HIV.
You are a person who injects drugs.
You have multiple sex partners.
You have sex partner(s) whose HIV status is unknown.
You’ve shared needles, syringes, or other drug injection equipment.
You’ve exchanged sex for drugs or money.
You have had another sexually transmitted disease.
You have hepatitis or tuberculosis.
The viral load is the amount of HIV in a person’s blood. The higher someone’s viral load, the more likely they are to transmit HIV.