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What is your profession?
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What I do specifically is called wastewater based epidemiology. While the term has been around for a few decades, it really took off in concordance with COVID. Previous PCR techniques like qPCR are heavily inhibited by co-elutors from wastewater extract. We use digital PCR which is way more resistant to inhibition due to the partitioning. We are using cutting edge technology and our R&D dept is constantly looking into additional targets we can test for. As a company we also do some non-pcr-based wastewater testing (drugs of abuse by LC/MS is a big one).
Additionally we also do next gen sequencing to track the COVID variants in communities.