CorDx ACT21002-25

CorDx Tyfast At Home Flu A/B and COVID-19 Multiplex Rapid Test

Instruction Manual

Product Overview

The CorDx Tyfast At Home Flu A/B and COVID-19 Multiplex Rapid Test is designed for the qualitative detection of influenza A and B nucleoprotein antigens and SARS-CoV-2 nucleocapsid protein antigens from direct anterior nasal swab specimens. This test is intended for use as an aid in the diagnosis of influenza A and B and COVID-19. Results are available in just 10 minutes.

This product is authorized for use in the United States under an Emergency Use Authorization (EUA).

What's in the Box

Each kit contains the following components:

  • (25) Covid & Flu-A/Flu-B Test Detection Cassettes
  • (25) Nasal Swabs
  • (25) Sample Collection Tubes with pre-filled buffer solution
  • (1) Instruction Manual & Quickstart Guide
Contents of the CorDx Tyfast At Home Flu A/B and COVID-19 Multiplex Rapid Test kit, showing 25 test cassettes, 25 nasal swabs, 25 sample collection tubes, and an instruction manual.

Image: Contents of the CorDx Tyfast At Home Flu A/B and COVID-19 Multiplex Rapid Test kit.

Important Safety Information

  • For in vitro diagnostic use only.
  • Do not use if you've had symptoms longer than 5 days or no symptoms at all.
  • Keep out of reach of children.
  • Store the test kit at room temperature (36-86°F / 2-30°C).
  • Do not use expired tests.
  • Follow all instructions carefully to ensure accurate results.

Setup and Preparation

Before you begin, ensure you have a clean, flat surface and all kit components are at room temperature.

  1. Wash your hands thoroughly with soap and water for at least 20 seconds.
  2. Open the foil pouch containing the test cassette just before use. Place the cassette on a clean, flat surface.
  3. Open the sample collection tube and place it upright in a holder or a cup to prevent spills.

Operating Instructions: Performing the Test

Follow these steps carefully to perform the test:

  1. Collect Sample: Carefully remove the nasal swab from its packaging. Insert the entire soft tip of the swab into your left nostril about 0.5 to 1 inch until resistance is met. Firmly rub the swab in a circular motion against the inside of your nostril 5 times. Using the same swab, repeat the process in your right nostril 5 times.
  2. Prepare Sample: Immediately insert the swab tip into the sample collection tube. Swirl the swab vigorously in the liquid for at least 10 seconds, pressing the tip against the bottom and sides of the tube.
  3. Extract Sample: While squeezing the tube, remove the swab. Dispose of the swab in a biohazard bag or sealed plastic bag. Securely close the cap of the sample collection tube.
  4. Add Drops to Cassette: Invert the sample collection tube and add 3 drops of the solution into the sample well (S) of the test cassette.
  5. Wait for Results: Set a timer for 10 minutes. Do not read the results before 10 minutes or after 15 minutes.
Four-step visual instructions for the CorDx Tyfast test: Swab Nostrils, Mix Sample & Solution, Add 3 Drops, Wait 10 min.

Image: Step-by-step visual guide for performing the test.

A person holding a nasal swab and a sample collection tube, demonstrating the sample preparation step.

Image: Preparing the sample with the nasal swab and collection tube.

Reading Your Results

Interpret your test results between 10 and 15 minutes after adding the drops to the cassette. Do not interpret results after 15 minutes as they may be inaccurate.

Diagram showing how to read positive, negative, and invalid results for COVID-19, Flu A, and Flu B on the test cassette.

Image: Visual guide for interpreting test results.

Positive Result

A positive result is indicated by the presence of the Control line (C) and one or more of the test lines (COV, Flu B, Flu A). Even a faint line should be considered a positive result.

  • COVID-19 Positive: Control line (C) and COVID line (COV) appear.
  • Flu A Positive: Control line (C) and Flu A line appear.
  • Flu B Positive: Control line (C) and Flu B line appear.
  • Combinations of Flu A, Flu B, and COVID-19 positive results are also possible, indicated by the respective lines appearing along with the Control line.

Negative Result

A negative result is indicated by the presence of only the Control line (C). No other lines (COV, Flu B, Flu A) appear.

Invalid Result

An invalid result occurs if the Control line (C) is not visible. This means the test did not run correctly. Discard the test and repeat with a new kit, ensuring all steps are followed precisely.

Maintenance and Storage

  • Store the test kits in their original sealed pouches at room temperature (36-86°F / 2-30°C) until the expiration date printed on the packaging.
  • Do not freeze the test kits.
  • Once the foil pouch is opened, the test cassette should be used immediately.
  • Dispose of used test components in accordance with local regulations for biohazardous waste.

Troubleshooting

ProblemPossible CauseSolution
No lines appear on the test cassette.Insufficient sample applied, or test performed incorrectly.Ensure 3 drops of solution are added to the sample well. Repeat the test with a new kit, carefully following all instructions.
Only the Control line (C) is visible, but symptoms are present.Negative result. The test did not detect antigens.A negative result does not rule out infection. If symptoms persist or worsen, consult a healthcare professional.
Test lines (COV, Flu A, Flu B) appear without the Control line (C).Invalid test. The test did not run correctly.Discard the test and repeat with a new kit. Ensure the test is performed within the specified temperature range and all steps are followed.
Results are unclear or faint.Insufficient sample, improper mixing, or reading outside the time window.Ensure proper sample collection and mixing. Read results strictly between 10 and 15 minutes. If still unclear, repeat the test.

Product Specifications

  • Product Name: CorDx Tyfast At Home Flu A/B and COVID-19 Multiplex Rapid Test
  • Model Number: ACT21002-25
  • Test Type: Antigen Rapid Test (Qualitative)
  • Sample Type: Anterior Nasal Swab
  • Time to Results: 10 minutes
  • Storage Temperature: 36-86°F (2-30°C)
  • Manufacturer: CorDx
  • Product Dimensions: 6.3 x 5.12 x 3.31 inches
  • Item Weight: 10.55 ounces

Official Product Video

Video: "BTS Season | Test Early, Stay Informed" - An official video from CorDx Tyfast demonstrating the importance and ease of early testing for Flu A/B and COVID-19.

Warranty and Support

For product support, frequently asked questions, or to learn more about CorDx products, please visit the official CorDx website:

CorDx.com

Please refer to the packaging for specific warranty information and contact details.

© 2025 CorDx. All rights reserved.

Ask a question about this manual

Ask about setup, troubleshooting, compatibility, parts, safety, or missing instructions. Manuals+ will review the question and use this page’s manual context to help answer it.

After a successful submission, we securely hash the supplied account or form email before sending it to Microsoft Advertising for conversion attribution. Privacy details.