SARS-CoV-2(23) variant(17) variants of concern(17) COVID-19(16) detect(13) omicron(13) Infection(13) Variant.(12) nucleocapsid(9) Fluorescence(9) clinical samples(8) sequence(8) B.1.1.7(8) processed(8) B.1.1.529(8) nucleic acid amplification tests(8) coronavirus disease(8) diagnostics(8) RT-LAMP(8) nasal samples(8) reverse transcription(8) nucleic acid amplification(8) FQ-LAMP(8) coronavirus(8) Transmission(8) fluorescence detection(8) WA1/2020(8) nasal swab(8) quantitative PCR(8) public health(8)