It is logical that if HIV cannot be transmitted through anal or vaginal intercourse when viral load is fully suppressed, the same will apply to oral sex. The risk of HIV transmission through vaginal or anal intercourse is effectively zero if a person with HIV is on treatment and has a fully suppressed viral load.
Safer sex guidelines have sometimes suggested that recent brushing can increase the risk of infection through oral sex. These conditions could make the tissues more susceptible to infection and/or allow the virus easier access to the bloodstream and immune tissues – similar to the way in which STIs (especially ulcerative STIs) are known to increase the risk of vaginal and anal intercourse.īrushing the teeth and gums often causes mild abrasions and stimulates bleeding.