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

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.
Not sure what you need? Text us and we will set it up.
📱 Text (713) 832-8892 📞 Call (713) 266-0808
📱 Text (713) 832-8892 📞 Call (713) 266-0808
3707 Westcenter Dr Suite 100, Houston, TX 77042 · Walk-ins welcome
What a positive does and does not establish
| It tells you | It does not tell you |
|---|---|
| The pathogen's genetic material was in your sample | Whether you are still infectious |
| Which pathogen it is — so treatment can be targeted | How severe your illness will be |
| Whether more than one virus is present | Whether 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
📱 Text (713) 832-8892 📞 Call (713) 266-0808
3707 Westcenter Dr Suite 100, Houston, TX 77042 · Walk-ins welcome
References
- CDC — Influenza Diagnostic Testing
- CDC — Isolation and Precautions
- Our CLIA #45D2048957 and CAP #8722734 credentials — verify them yourself
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