RT-PCR's primary function is to vet false positive or negative result provided by antigen rapid test. 

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This is critical to make sure that false positive individuals do not get quarantined unnecessarily, and that false negative patients do not end up spreading the virus to a greater number of other people.

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The limitation of RT-PCR, is that it requires expensive facilities and trained staff. This can be partly resolved by our rapid RT-PCR machine.