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antigen Self-test Antigen testing Nucleic acid testing Smell Yumei Coronavirus infection
03-12
![Antigen self-test who can measure? How to test? Wen Yumei: It is recommended to buy a real-name system[fig]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)