SARS-CoV-2 Spike Protein Receptor Binding Domain (RBD) Nucleic Acid Test by Reverse Transcription Polymerase Chain Reaction (RT-PCR)

How the Test Works

The test uses a small sample of your respiratory secretions (like nasal or throat swab fluid) to identify the virus’s genetic material. It works by amplifying and detecting specific sequences of the virus’s RBD region, which is a key part of its spike protein that binds to human cells.

What to Expect Before the Test

You may have been instructed to avoid certain medications (like some antibiotics or antiviral drugs) before testing, but this depends on your healthcare provider’s guidance. Follow any specific instructions they give you, such as fasting or avoiding certain fluids.

Sample Collection Process

A healthcare provider will collect a sample from your nose or throat using a swab. You may feel slight discomfort, but it usually takes only a few seconds. The sample is then sent to a lab for testing.

When This Test Might Be Ordered

Your doctor may recommend this test if you have symptoms of COVID-19 (like fever, cough, or shortness of breath), have been exposed to someone with the virus, or if you’re in a setting where testing is required (like travel or workplace protocols).