How to do antigen video tutorial?

A video tutorial on how to make antigens can be viewed at the following website:

/ggxw/202212/58778929.html (60 seconds! Teach you how to operate COVID-19 antigen self-test at home)

In addition, the steps of self-test antigen are as follows:

1. Preparation before antigen detection: First disinfect your hands, then open our kit and take out the extraction tube, test card and sampling tube.

2. Sampling: Then we need to take out the sampling tube and collect samples. Tilt your head slightly, hold the tail of a cotton swab in one hand and stick it on one nostril, then slowly penetrate back to 1- 1.5cm along the bottom, then stick it on the nasal cavity and rotate it for at least 4 times, with the residence time not less than 15s, and then repeat the same operation on the other nasal cavity with the same cotton swab.

3. Sample detection: place a nasal swab immediately after the sample is collected in the sampling tube, and the swab head should be rotated and mixed evenly in the preservation solution for at least 30 seconds. At the same time, squeeze the cotton swab head through the outer wall of the sampling tube for at least 5 times, and discard the cotton swab after squeezing the cotton swab head through the outer wall of the sampling tube by hand. After covering the sampling tube, drop the liquid vertically into the sample hole of the detection card.

4. Results: Red or purple bands are displayed at C and T, and the color of bands at T can be dark or light, all of which are positive results; A red or purple band is displayed at C, a negative result is displayed at T, and a red or purple band is not displayed at C. No matter whether a band is displayed at T, the result is invalid and needs to be re-tested.