Why Test for Flu, COVID and RSV Together?
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
One swab. Flu A/B, SARS-CoV-2, and RSV. Same-day PCR, because the treatments differ.CLIA #45D2048957 · CAP #8722734 · Same-day results · Walk-ins welcome
Because you cannot tell them apart from symptoms — fever, cough, aches, sore throat — and yet the management is completely different. Influenza has antivirals that work best within 48 hours. COVID has its own antivirals with an early window. RSV has neither, but it identifies who is at risk and who should stay away from infants and elderly relatives.
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
Same symptoms, different consequences
| Pathogen | What changes if you know |
|---|---|
| Influenza A/B | Antiviral therapy, most effective within 48 hours of onset (CDC) |
| SARS-CoV-2 | Antivirals for those at higher risk, with an early treatment window |
| RSV | Supportive care — but critical for infants and older adults, who are at real risk |
| All negative | Look further: strep, Mycoplasma, or something else — and stop the antibiotic reflex |
The 48-hour antiviral window is the entire argument for same-day testing in respiratory illness. A result on day three is a historical record, not a clinical decision.
Go to an emergency department, not a lab, if you have: difficulty breathing or shortness of breath at rest, chest pain or pressure, blue lips, confusion, inability to stay awake, or a child with fast or labored breathing. Those are respiratory emergencies.
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 when started within 48 hours of symptom onset — and COVID antivirals have their own early window. A test that comes back in three days has missed the decision entirely. 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
- Is the swab uncomfortable?
- A brief nasal swab. Seconds.
- Can I have more than one virus?
- Co-infection happens. A multiplex panel detects each target independently.
- What if everything is negative?
- Then the physician looks further — see strep and Mycoplasma pneumoniae.
- How fast is the result?
- Same day at 4:30 PM; STAT about 2 hours.
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