The letters “C” and “T” represent the control and test lines, respectively, on rapid antigen tests, such as those used with the Inteliswab platform. A visible line at the “C” position confirms the test has functioned correctly. A visible line at the “T” position indicates a positive result for the SARS-CoV-2 virus. The absence of a “T” line, assuming a valid “C” line, suggests a negative result. However, a faint “T” line should still be interpreted as a positive result.
Rapid antigen tests offer advantages in terms of speed and accessibility, providing results within minutes without requiring specialized laboratory equipment. This makes them valuable tools for point-of-care diagnostics, enabling timely decisions regarding isolation and treatment. While not as sensitive as PCR tests, their rapid turnaround time contributes significantly to public health strategies for managing outbreaks and mitigating community spread. The use of clear indicators, like the C and T lines, simplifies interpretation, facilitating broader use and understanding among both healthcare professionals and the general public.
