SARS-CoV-2(23) variants of concern(17) variant(17) COVID-19(16) omicron(13) Infection(13) detect(13) Variant.(12) Fluorescence(9) nucleocapsid(9) reverse transcription(8) nucleic acid amplification(8) FQ-LAMP(8) coronavirus(8) Transmission(8) fluorescence detection(8) primer(8) nasal swab(8) quantitative PCR(8) public health(8) Delta(8) amplification(8) sequence(8) Loop-mediated isothermal amplification(8) processed(8) isothermal amplification(8) SARS coronavirus 2(8) isothermal(8) POC(8) nucleic acid(8)