CRL Rapid Response™
Rapid COVID-19 Saliva Based PCR Test
PCR vs. Antigen Testing
- Antigen testing, unlike molecular testing, does not involve any amplification. Thus, it is not nearly as sensitive and able to pick up low levels of virus as compared to molecular tests.
- Since antigen testing is dependent upon higher levels of the virus for detection, it is most accurate in the acute phase of infection when viral loads are the highest. All current FDA EUA antigen tests (n=4) are only authorized for use from symptom onset up to 5-12 days past symptom onset due to this. (The number of days varies by assay.) Molecular tests do not have this limitation due to their sensitivity and limit of detection.
- Molecular RT-PCR tests remain the gold standard by the FDA and CDC for the clinical diagnostic detection of SARS-CoV-2. The CDC states it “may be necessary to confirm a rapid antigen test result with a nucleic acid tests, especially if the result of the antigen test is inconsistent with the clinical context”. https://www.cdc.gov/coronavirus/2019-ncov/lab/resources/antigen-tests-guidelines.html
- Current antigen tests are all based on nasal swabs, and CRL’s Rapid Response test is saliva.
The test simply requires that an individual’s saliva be deposited in a provided collection vial and sent back to our laboratories using the prepaid one-day shipping package. Specimens are typically processed within 24-48 hours of receipt at our laboratory and individuals can access their test results online through a two-factor authentication protected portal. Individuals have the option to speak with a licensed physician about their results.
Once your order has been confirmed, a kit will be shipped to your home for you to continue the collection process.
Testing performed by Clinical Reference Laboratory, Inc. Restrictions may apply. This test does not detect antibodies or immunity. It is designed to determine active infection with the virus that causes COVID-19.
Deerfield Beach, FL 33442