There are three main steps in antigen self-test.

First, preparation before antigen self-test.

1, wash your hands.

Wash your hands with running water or hand disinfectant.

2. Understand the detection process.

Carefully read the matching instructions of antigen self-test reagents and the precautions related to antigen self-test.

3, reagent preparation.

Check whether the antigen self-test reagent is within the warranty period, and check whether the contents such as nasal swab, sampling tube and test card are missing or damaged. If the reagent expires or the contents of the reagent are lost or damaged, the detection reagent should be replaced in time.

4. Confirm the requirements for ambient temperature and humidity.

Colloidal gold test paper generally requires room temperature of 14℃-30℃ to avoid abnormal test results caused by supercooling, overheating or excessive humidity. The antigen test card is unpacked and placed in a flat and clean place.

Second, sample collection.

1 and 14 years old or older can take nasal swab samples by themselves.

The self-inspector blows his nose with toilet paper first. Carefully open the outer package of the nasal swab to avoid hand contact with the swab head. Then tilt your head slightly, stick a cotton swab on one nostril with the tail of one hand, then slowly infiltrate back to 1- 1.5cm along the bottom of the inferior nasal passage, then stick it on the nasal cavity and rotate it for at least 4 times, and then repeat the same operation on the other nasal cavity with the same cotton swab.

2, age 2- 14 years old self-study exam should be attended by other adults.

When sampling, first blow your nose with toilet paper, and then tilt your head slightly. The sampler carefully unpacks the outer package of the nasal swab to avoid touching the swab head with his hand. One hand gently holds the head of the person being collected, and the other hand sticks the swab to one nostril, slowly permeates back to 65438±0cm along the bottom of the lower nasal passage, then sticks it to the nasal cavity and rotates it for at least 4 times, and then repeats the same operation on the other nasal cavity with the same swab.

Third, antigen detection.

1, according to the reagent instructions, put the nasal swab into the sampling tube immediately after collecting the sample, rotate the swab head in the preservation solution for at least 30 seconds, and squeeze the swab head through the outer wall of the sampling tube for at least 5 times by hand to ensure that the sample is fully eluted in the sampling tube.

2. Squeeze the liquid at the tip of the cotton swab through the outer wall of the sampling tube by hand, and then discard the cotton swab. After covering the sampling tube, drop the liquid vertically into the sample hole of the detection card.

3, according to the reagent instructions, wait for a certain period of time to interpret the results.

Positive result:

Both "C" and "T" show red or purple bands, and the band color at "T" can be dark or light, which are positive results.

Negative results:

Red or purple stripes are displayed at "C" and no stripes are displayed at "T".

Invalid result:

Whether the stripes are displayed at "T" or not, red or purple stripes will not be displayed at "C". The result is invalid, so you need to take the test paper again.