Biology, life sciences COVID-19 COVID-19 diagnosis Raman spectra Research & information: general SARS-CoV-2 SARSC-CoV-2 SH-SAW biosensor a point-of-care device antibodies antibody biosensor biosensors chip clinical decision support tool copper deposition diagnosis diagnostics electrochemical electrochemical biosensor epitope field-effect transistor humoral immunity immunochromatography immunological diagnostic lateral flow immunoassay latex microspheres machine learning microfluidic microfluidics