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1. Preparation  rapid self test Wash your hands with running water or hand sanitizer. After cleaning your hands, unpack the antigen test card and place it in a flat and clean place. Learn about the testing process. Carefully read the supporting instructions of the antigen self-test reagent and related precautions for antigen self-test, check whether the antigen self-test reagent is within the shelf life, and check whether the contents of the nasal swab, sampling tube, test card, etc. are missing or damaged. 2. Sample collection Carefully unpack the nasal swab and avoid touching the swab head with your hands. Then tilt your head slightly, hold the tail of the swab in one hand and stick it into one nostril, slowly go back along the bottom of the lower nasal passage for 1-1.5 cm, then stick it to the nasal cavity and rotate it at least 4 times (stay for no less than 15 seconds), then Repeat for the other nasal cavity using the same swab. It should be noted that the antigen detection is th

Now due to the epidemic of the new coronavirus, masks have played a great role. How do we choose  kn95 mask with adjustable ear loops   from regular manufacturers in our daily life? 1. Regular masks will mark the place of origin and the manufacturer. You can use Baidu Enterprise Credit to query the information of the mask manufacturer to see if it is a regular mask manufacturer. 2. Qualified medical masks will be marked with a production license number, and you can check whether the license number is true and valid on the national official website. 3. Different types of masks have different production standards, and different standards have different requirements for the quality of masks. You can check the specific requirements in the production standards of masks to judge whether they are qualified. 4. Regular masks will mark the production date and shelf life, and check whether the mask is still within the validity period. like： How to distinguish the quality of masks How to choose a