Hunan Key Laboratory of Biomedical Nanomaterials and Devices;
Hunan University of Technology;
Zhuzhou 412007;
China;
State Key Laboratory of Quality Research in Chinese Medicine;
Macao University of Science and Technology;
Macao 999078;
China;
State Key Laboratory of Bioelectronics;
National Demonstration Center for Experimental Biomedical Engineering Education;
School of Biological Science and Medical Engineering;
Southeast University;
Nanjing 210096;
China;
Aerosol detection; Air sampling; Immunomagnetic nanoparticle; ddPCR; SARS–CoV–2;