Your Negative HIV Test at 5 Months is Conclusive
Your negative HIV test at 5 months (approximately 150 days) after condomless oral sex definitively rules out HIV infection from that exposure, and no further testing is needed. 1
Understanding Your Risk from Oral Sex
The transmission risk from oral sex is extremely low compared to other sexual activities:
- Receptive oral sex (performing fellatio): The risk is almost non-existent, particularly for the person performing oral sex 2
- Insertive oral sex (receiving fellatio): The risk is virtually zero 2
- Saliva is not infectious for HIV unless it contains visible blood 3
Non-bloody saliva is explicitly listed as a non-infectious body fluid for HIV transmission. 3
Why Your Test is Definitive
Your testing timeline far exceeds what's needed for conclusive results:
- Modern HIV tests detect infection within 11-14 days in most cases when using fourth-generation antigen/antibody tests 1
- The CDC confirms that negative tests after 94 days are conclusive for ruling out HIV infection 1
- Your test at 5 months (150 days) provides absolute certainty that you did not acquire HIV from this exposure 1
The eclipse period (time between exposure and detectable infection) averages only 8-10 days, and virtually all infections are detectable within 3-4 weeks using modern combination tests. 1, 4
What You Should Do Now
No further HIV testing is required unless you have a new exposure to HIV. 1
Important Considerations Going Forward:
- If you continue having condomless sex, consider discussing pre-exposure prophylaxis (PrEP) with a healthcare provider, as this can prevent future HIV acquisition 3
- Get tested for other sexually transmitted infections, as these can be transmitted through oral sex even when HIV risk is minimal 3
- Routine HIV screening is recommended for sexually active individuals, but this would be for future exposures, not the one you're asking about 3
Common Pitfall to Avoid:
Do not continue testing repeatedly for this specific exposure out of anxiety—your negative result at 5 months is final and conclusive. 1 Repeated unnecessary testing can increase anxiety without providing additional medical value. However, if you have ongoing risk behaviors, regular screening (such as every 3-6 months) is appropriate for detecting any new exposures. 3