The InteliSwabTM COVID-19 Rapid Test is for the detection of the antigen associated with COVID-19, not for any other viruses or pathogens. Explainer: How to use Covid-19 self-test kits, how they work and what ... Recently, a "weak positive" case of COVID-19 . The information in this article is current as of the date listed, which means newer information may be available when you read this. If you get COVID-19, you may test positive on a PCR test for several weeks after you have ceased to be infectious. Coronavirus test: What is CT-count in a COVID-19 test? What does it ... Molecular tests, such as polymerase chain reaction (PCR) tests Antigen tests, often referred to as rapid tests Samples for COVID-19 diagnostic tests are typically collected using an anterior nares. I wasn't sure what this meant, and the results page said little more than "This doesn't mean you have COVID-19," followed by some instructions for taking precautions just in case I did have the . Worldwide, the Ct value is set within a range of 35-40 to determine COVID infection. The PCR test identifies the presence of genetic material from the virus, whilst the antigen test, commonly known as the rapid lateral flow . Two red lines indicate a positive test. Understanding COVID-19 Test Results | Rush System What Is an Antigen Test? | coronavirus Antigen tests work best if you have symptoms. While other diagnostic tests for COVID-19, known as PCR tests, look for genetic material from the virus, the antigen test looks for molecules on the surface of the virus. The test kit may have expired, or you didn't take the test correctly if the C coloured line shows and the T (or Ag) line does not, your result is negative (you're unlikely to have COVID-19) if both the C and T (or Ag) lines show up, your result is positive (you're likely to have COVID-19). Understanding COVID-19 Test Results | Rush System