You Tested Positive — Are You Still Contagious?

Medically reviewed by our MD Laboratory Director (a role required by CLIA; the director's name is on file in the CMS CLIA database, #45D2048957, and can be verified independently) · Editorial policy
Molecular fluorescence imaging — Auspicious Laboratory, Houston
Detection of viral RNA is not proof of an active, transmissible infection.CLIA #45D2048957 · CAP #8722734 · Same-day results · Walk-ins welcome
Not necessarily. PCR is extremely sensitive and can detect residual viral nucleic acid for weeks after recovery, particularly with SARS-CoV-2. A positive PCR tells you the genetic material is there. It does not, by itself, prove that live, transmissible virus is present. Symptoms, timing and the clinical picture decide — which is why CDC bases isolation guidance on symptoms and time, not on repeat PCR.
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What a positive does and does not establish

It tells youIt does not tell you
The pathogen's genetic material was in your sampleWhether you are still infectious
Which pathogen it is — so treatment can be targetedHow severe your illness will be
Whether more than one virus is presentWhether a detected virus is the cause of your symptoms, or an incidental finding

Do not use repeat PCR to decide when to go back to work after COVID. CDC guidance is based on symptoms and time — see return-to-work guidance.

Go to an emergency department, not a lab, if you have: shortness of breath at rest, chest pain or pressure, blue lips, confusion, inability to stay awake, or a child breathing fast, grunting, or pulling in at the ribs.
We name drugs, never doses. Treatment statements follow CDC and IDSA guidance; dose and duration are a physician's decision.
Why same-day matters in respiratory illness. Influenza antivirals work best within 48 hours of onset. Swab by 1:00 PM → result at 4:30 PM → licensed physician (partner network) 4:30–6:00 PM. Two stops, both the same day.

FAQ

I am positive but feel fine. Am I sick?
You may be early, mild, or shedding residual material. The physician interprets it with your history.
Should I retest to prove I am clear?
Generally no for PCR. Follow symptom- and time-based guidance.
Two viruses detected — is that possible?
Yes, co-infection occurs. Each target is detected independently.
Who explains my result?
The partner-network physician, the same evening.
Not sure what you need? Text us and we will set it up.
📱 Text (713) 832-8892 📞 Call (713) 266-0808
3707 Westcenter Dr Suite 100, Houston, TX 77042 · Walk-ins welcome

References

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