Missing ‘S’ gene in RT-PCR test can point to Omicron

With the emergence of the Omicron variant, public health experts want laboratories to conduct RT-PCR tests in whole for all the three genes, particularly on international travellers, to help detect the absence of the ‘S’ gene. Maharashtra state task force member Dr Shashank Joshi on Monday told TOI that a complete RT-PCR report for Covid included that of the ‘N’ , ‘S’ , ‘E’ and ‘ORF’ genes.

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