The LifeDX COVID-19 + Flu A/B-Ag test is a lateral flow immunochromatographic assay designed for the simultaneous qualitative detection and differentiation of SARS-CoV-2, Influenza A, and Influenza B viral antigens in nasopharyngeal swab samples. This rapid test is ideal for detecting these viruses in one simple test, enabling quicker response and better management of patients.

The test detects the presence of SARS-CoV-2, Influenza A, and Influenza B antigens through a lateral flow immuno-chromatographic process. When the reactive sample and buffer are added to the sample pad, the liquid migrates towards the conjugate pad, which contains gold nanoparticles conjugated with monoclonal antibodies for SARS-CoV-2, Influenza A, and Influenza B. These antibodies bind to their respective antigens, creating visible color lines in the test zones (S for SARS-CoV-2, A for Influenza A, and B for Influenza B).

If any of the viral antigens are present in the sample, a color line will appear in the corresponding test zone. If no antigens are present, no color line will form. The Control line (C) always appears as a procedural control to ensure proper testing procedure.

This test requires a nasopharyngeal swab sample.

1. Tilt the patient’s head back at 70 degrees.
2. Insert the swab into the nostril until the swab reaches the distance between the nostrils and the outer ear.
3. Leave the swab in place for several seconds to absorb secretions, then slowly remove while rotating the swab.

If the specimen is not tested immediately, store it in a dry tube and seal tightly. Samples may be stored at 2-8°C for up to 8 hours, or at -70°C for longer periods. It is recommended to test specimens immediately after collection for optimal accuracy.