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RT-PCR is the accepted gold standard for diagnosis of COVID-19.The specificity of RT-PCR is very good,but its sensitivity largely depends on the type of sample collected,timing of collection,clinical sampling protocol,and nucleic acid detection technology employed.The detection rate of RT-PCR compared with chest CT is<70%during the acute phase(0-7 days post onset(DPO)and is only 50%by the second week of illness.Positivity from sputum and nasal swabs is 74.4-88.9%and 53.6-73.3%,respectively.RT-PCR is expensive and requires specialized laboratory equipment and trained personnel[1].Reliable antigen detection tests for quick detection of COVID-19 patients remain unavail-able in India.