How Accurate Are STD Tests?

Q: How Accurate Are STD Tests?

HIV RNA 99%+, chlamydia/gonorrhea NAAT 95-99%, syphilis 85-95%, herpes blood 70-90%. False negatives occur if tested too early.

Accuracy depends on infection type, test method, and timing.

Accuracy by Infection

HIV RNA: 99%+
Chlamydia/Gonorrhea NAAT: 95–99%
Syphilis: 85–95%
Herpes blood: 70–90%

False Negatives

Testing too early
Very recent exposure

False Positives

Less common
Confirmatory testing eliminates most

Maximizing Accuracy

Test at correct window period
Use NAAT tests
Re-test if recent exposure

Source: CDC, American Sexual Health Association.

Ratings summarize government-reported measures — they don't capture your personal needs. Visit the facility, ask about staffing and services, and use CMS checklists. This profile is informational only and is not a recommendation.

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