A one-step in vitro diagnostic test based on an immunochromatographic method. It serves as an assay for the qualitative detection of IgG and IgM immunoglobulins produced against the SARS CoV-2 virus in human blood. The test can be used as part of the initial diagnosis of COVID-19 disease. The kit is complete and contains all components necessary for performing the assay, including the components necessary for finger prick blood collection.