Limited specificity of SARS-CoV-2 antigen-detecting rapid diagnostic tests at low temperatures
2021
SARS-CoV-2 antigen-detecting rapid diagnostic tests (Ag-RDTs) are available within and outside of health care settings to enable increased access to COVID-19 diagnosis. These environments include provisional testing facilities, lacking temperature control; as outside temperatures fall, recommended testing temperatures cannot be guaranteed. We report impaired specificity in two out of six Ag-RDTs when used at 2-4{degrees}C, indicating that testing in cold settings might cause false-positive results potentially entailing unwarranted quarantine assignments and incorrect incidence estimates.
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