How to use a self-test kit for COVID-19 antigen

　　The novel coronavirus antigen self-test kit refers to a test for detecting SARS-CoV-2 antigens, which allows for a simple and rapid screening for coronavirus infection without being restricted by time or location. The specific steps are as follows:

　　1. Preparation: Wash your hands with clean water and clear any secretions from the nasal cavity. Carefully read the instructions after opening the package, then remove the sample extraction tube and test device, placing them on a clean, flat surface.

　　2. Sample collection: Open the outer packaging of the swab. Hold the plastic end of the disposable swab and remove it, avoiding contact between your fingers and the swab tip. Tilt your head slightly backward. Holding the swab by its tail, insert it into one nostril along the lower part of the nasal passage, advancing slowly until it reaches 1–1.5 centimeters inside, then rotate it against the nasal wall for four full turns. Repeat the same procedure in the other nostril using the same swab.

　　3. Testing: First, insert the swab into the sample extraction tube and snap it off at the designated breakpoint. Then, remove the cap and add four drops of the extracted sample solution into the sample well. Wait 15–30 minutes before reading the result.