Test for COVID-19 & Flu A&B at Home – Quick and Easy Guide How to use the Healgen COVID Flu Test, a 3-in-1 COVID-19 and Flu A&B home test, in a very simple way. Inside the box, you will find a test cassette, a sterile nasal swab, an extraction tube with a buffer, and a tube holder. First, wash your hands and place the tube in the holder. Next, gently collect a sample from both nostrils using the swab. Put the swab into the tube and mix it for 30 seconds. Then, close the tube with the nozzle cap and add 3 drops of the liquid into the test cassette. Wait 15 minutes before checking the result. A control (C) line must appear. If it does not, the test is invalid and should be repeated. https://rcshcg.com/products/healgen%E2%84%A2-sars-cov-2-flu-a-b-rapid-antigen-test-controls?_pos=1&_sid=746bffb30&_ss=r