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Kenneth burton is a scholar in forensic chemistry. >> you can train them to above 90% accuracy. when we train these covid-19 dogs, we did double blind studies and published them in a peer-reviewed journal. we received a 97.5% average accuracy in double blind trials. >> reporter: however, there is acknowledgment that things like density of a space or an unmotivated dog can make accurate canine covid hits harder to come by. the research is promising, but it's still early. are you concerned that parents here and other people here will say, we don't need to mask up all the time, we don't need vacc...

Accuracy in double blind trials. >> reporter: however, there is acknowledgment that things like density of a space or an unmotivated dog can make accurate hits harder to come by. the research is promising, but it's still early. >> are you concerned that parents here and other people here will say we don't need to mask up all the time, we don't need vaccines or a test, we have the dogs? >> this is not to replace what the cdc and the dph are telling people in the communities about what to do. that's a whole part of the science and what they believe is a preventative measure. this is a way for us...