This same non-profit, the APOPO, also trains these rats to detect tuberculosis. Apparently the laboratory testing in Tanzania produces a lot of false negatives,

This same non-profit, the APOPO, also trains these rats to detect tuberculosis. Apparently the laboratory testing in Tanzania produces a lot of false negatives, and the rats can screen the same number of samples it takes a lab tech an entire day to test. They use the rats to double check the lab tests and identify samples to be re-tested.[1] [1]https://www.nationalgeographic.com/news/2014/8/140816-rats-tuberculosis-smell-disease-health-animals-world/ https://www.nationalgeographic.com/news/2014/8/140816-rats-t...