Quidel Rapid Diagnostic Tests

For clinics, urgent care centers, and physician offices that need results before the patient leaves the room, Quidel's Sofia platform delivers laboratory-quality accuracy at the point of care. This collection centers on the Sofia and Sofia 2 immunoassay systems, which read fluorescent test cassettes objectively — removing the guesswork and reader-to-reader variability that comes with visually interpreted rapid tests.

The Quidel Sofia 2 Respiratory Test Kit (20377) runs 25 machine-read tests from a nasal swab sample and is built specifically for the Sofia 2 Fluorescent Immunoassay Analyzer. If your facility runs the earlier instrument or wants dual compatibility, the Quidel Sofia Respiratory Test Kit (20374) works with both the original Sofia and Sofia 2, and accepts either nasal swab or nasopharyngeal swab specimens — a useful flexibility when collection preferences vary by patient or protocol.

Buyers evaluating these kits usually want to confirm a few things up front: both are 25-test packs, both are objectively read by the analyzer rather than interpreted by eye, and each is matched to a specific instrument, so it's worth verifying which Sofia model your practice already owns before ordering. The machine-read workflow also supports consistent documentation and reduces subjective calls during high-volume respiratory seasons.

Because the analyzer is a one-time capital purchase and the test kits are the recurring consumable, most facilities standardize on one platform and reorder cassettes as volume dictates. Stocking the right swab-compatible kit ahead of flu and RSV season helps avoid supply gaps when demand spikes.

Explore related point-of-care and diagnostic supplies across our broader Diagnostics category to round out your testing workflow.