The Conversation – Fiona Russell and Kathleen Ryan
A few key features are important when screening for disease. In the case of non-contact infrared thermometers, the “disease” we’re screening for is fever. First, a tool should be able to correctly identify those with the disease (sensitivity). Second, a tool should correctly identify those without the disease (specificity). Third, a tool should have high probability that a person with a positive result does have the disease (positive predictive value, or PPV).
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