Like everything else in life, it depends. Generally every three to six months if you:
- Have had unprotected sex (vaginal, anal or oral) with multiple or anonymous partners
- Have had unprotected sex with a partner who did not know their own HIV status
- Share needles or other equipment for injecting drugs (including steroids), or have shared needles in the past
- Have a history of sexually transmitted diseases (STDs)
If these categories don’t describe you, still seriously consider getting an HIV test. The Centers for Disease Control & Prevention recommends that everyone between the ages of 13 and 64 be tested for HIV at least once as part of their routine health care.