How to Use the Cordx Tyfast Flu A/B & COVID-19 Multiplex Rapid Test?

In today’s world, being healthy and staying safe is very important. Every year, many people get sick from the flu or COVID-19. These sicknesses spread easily, and sometimes the symptoms look the same. That is why it is helpful to have a test that can check for both flu and COVID-19 at the same time.

The Cordx Tyfast Flu A/B & COVID-19 Multiplex Rapid Test is a tool that helps us find out whether someone has influenza A, influenza B, or COVID-19 quickly and easily. This blog will explain, in simple language, how to use this test step by step, what to expect, and how to read the results correctly.

This blog is written like a handwritten guide — easy to read and understand — so that anyone can use the test correctly. Let’s begin!


What Is the Cordx Tyfast Flu A/B & COVID-19 Multiplex Rapid Test?





This test is a rapid diagnostic kit. That means it gives results quickly — usually within a few minutes. It checks for:

  • Flu A (Influenza A virus)

  • Flu B (Influenza B virus)

  • COVID-19 (SARS-CoV-2 virus)

All of this is done using one test device. The test detects proteins (antigens) from the viruses.

So, instead of doing three separate tests, this one test can check for all three illnesses at once. This saves time and helps doctors make fast decisions.


Why Use This Test?


There are many important reasons:

  • You feel sick with a cough, fever, or sore throat.
  • You want to know if it is flu or COVID-19 or both.
  • You need quick results before traveling or visiting someone.
  • You want safe care for yourself and others.

The major benefit is that this test is simple, fast, and easy to use even at home or in small clinics.


What Comes Inside the Test Box?


Before we start testing, let’s see what you get in the kit:

  • 25 Test Cassette – The main device where results show
  • 25 Sterile Swab – To collect the sample
  • 25 Extraction Buffer Tube – A liquid to help release virus material
  • Dropper Cap – To place drops on the test
  • 1 Instructions Leaflet

Always use everything that comes in the box. Do not mix with parts from another kit.


Before You Start: Important Preparations


Before you begin the test, follow these simple steps:

  1. Wash your hands with soap and water.

  2. Pick a clean flat surface to do the test.

  3. Check the expiration date on the kit.

    • Do not use it if expired.

  4. Make sure the test package is not damaged.

    • If torn or wet, do not use it.

  5. Read the instructions fully once before you start.

Being careful will help you get accurate results.


Step-by-Step Instructions


Now we will learn how to use the test step by step.


Step 1: Open the Test Kit


Open the foil pouch and take out the test cassette.
 Place it flat on the table.

👉 Do not touch the small round holes on the cassette.


Step 2: Collect the Sample

This is the most important part.

  1. Hold the sterile swab by the handle.

  2. Gently insert the soft tip of the swab into one nostril.

  3. Push it back slowly about 2–3 cm (as much as comfortable).

  4. Turn the swab in a circular motion 5 times.

  5. Do the same in the other nostril with the same swab.

Make sure you do it gently but firmly.


Step 3: Prepare the Sample Tube

  1. Open the extraction buffer tube.

  2. Insert the swab into the tube.

  3. Mix it in the liquid by turning it 5–6 times.

  4. Press the swab tip against the side of the tube to release as much fluid as possible.

  5. Discard the swab safely.

Step 4: Add the Sample to the Test Device


  1. Put the dropper cap on the tube.

  2. Turn the tube upside down.

  3. Add 3 drops into the small well (sample area) on the test cassette.

👉 Make sure drops go into the right spot.


Step 5: Wait for the Result


Now the test will start working.
 Set a timer for 10 minutes — this is the correct time to wait.

  • Do not read the result before 10 minutes.
  • Do not read the result after 20 minutes because it may be wrong.


How to Read the Results


The test cassette has four lines labeled:

  • C (Control Line)

  • SARS-CoV-2

  • Influenza A

  • Influenza B

Let’s see what the lines mean:


A. Negative Result


Only the C line shows up.
No lines at SARS-CoV-2, Flu A, or Flu B.

This means no virus was detected.

But if you still feel sick, talk to a doctor.


B. Positive Result


If lines show up like this:

  • C + SARS-CoV-2 ➡ You have COVID-19.
  • C + Influenza A ➡ You have Flu A.
  • C + Influenza B ➡ You have Flu B.
  • C + more than one line ➡ It means you might have more than one infection.

Example:
 C + SARS-CoV-2 + Flu A ➡ COVID-19 and Flu A both present.


C. Invalid Result


If the C line does NOT appear, the test is invalid—even if other lines show.

  • Invalid means the test did not work correctly.
  • You must do the test again with a new kit.


7. Tips for Correct Testing


To make sure the test is accurate:

  • Do not touch the tip of the swab.
  • Do not blow or sneeze into the kit.
  • Keep the kit at room temperature.
  • Do not shake the tube hard.
  • Be patient and read results only at the correct time.

8. What to Do After Getting Results


If the result is Positive

  • Stay home and rest.
  • Wear a mask and avoid close contact with others.
  • Drink water and follow doctor’s advice.
  • Isolate yourself to protect family members.

If the result is Negative

  • It means no virus was found at this time.
  • But sickness may still be possible if symptoms are early.
  • If you still feel sick after 1–2 days, test again or see a doctor.

If the result is Invalid

  • Throw the test parts safely.
  • Wash hands again.
  • Use a new test kit and repeat the steps.


9. Safety and Storage


  • Store the test kit at room temperature.
  • Keep away from direct sunlight.
  • Keep it out of reach of children.
  • Do not reuse any of the items.
  • Throw all used materials into a trash bag and close it well.

Common Questions (FAQs)


Q: Can this test be done at home?

Yes, it is made for home or clinic use.

Q: Does it hurt?

You may feel a little tickle inside the nose. It does not hurt much.

Q: How long does the test take?

You will get results within 15 minutes after adding the sample.

Q: Is it accurate?

Yes, when used correctly, it shows reliable results.


Final Words


The Cordx Tyfast Flu A/B & COVID-19 Multiplex Rapid Test is a helpful tool when you feel sick or want to check whether you have flu or COVID-19. It is designed to be easy, quick, and simple.

By following the steps in this blog — from preparing the kit to reading the results — you can use the test with confidence. Always be careful, follow safety steps, and if you are unsure, ask a healthcare professional.

Being informed and prepared helps you stay safe and healthy.

Stay well and take care! 
Location: United States

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