Respiratory Syncytial Virus Antibody, Serum (Qualitative or Quantitative)

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms of respiratory infection, such as coughing, wheezing, or difficulty breathing, especially if you’re at higher risk for severe RSV illness. It could also be used to check for past exposure in certain clinical settings, like newborn monitoring or immune-compromised patient follow-up.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into your arm to draw blood. The process usually takes a few minutes. If you’re a newborn or infant, a heel prick may be used instead.

What the Test Results Mean

Results are qualitative (positive/negative) or quantitative (showing exact antibody levels). A positive result suggests your body has made antibodies to RSV, indicating past exposure. A negative result means no detectable antibodies were found at the time of testing.

Common Uses and Limitations

This test is primarily used for diagnostic screening or monitoring in specific clinical situations, such as evaluating RSV risk in vulnerable populations. It does not replace other diagnostic tests like viral testing for immediate confirmation of active RSV infection.