What Is Respiratory Syncytial Virus (RSV)?
What it is
RSV antigen
Why it matters
Major cause of infant/elderly respiratory infection.
Specimen
Swab
Interpretation
Positive = active infection
Limitations
Antigen indicates active infection
Related test: RSV Rapid Test — specimen: NP swab / Nasal aspirate
Frequently Asked Questions
What does an RSV antigen test detect? Active RSV infection — a major cause of infant/elderly respiratory illness.
Related knowledge
References
- CDC. RSV testing guidance.
Last reviewed: 2026-09-12