Amazingbio COVID-19 Antigen Sealing Tube Test Strip is an in vitro lateral flow immunochromatographic assay for qualita-tive detection of nucleocapsid protein of SARS-CoV-2 virus in human nasopharyngeal, nasal secretion or saliva specimens directly col-lected from individuals suspected of COVID-19 within the first seven days after the onset of symptoms. It’ s a quick and easy-to-use test in the diagnosis of SARS-CoV-2 infection to humans.