Many people do not get tested for HIV because they fear a positive result for the incurable disease. However the public probably benefits from people getting tested, in the hopes that people who know they are infected will change their behavior. Hence the advertising campaign to encourage people to get tested.
Another much weirder way to encourage people to get tested is to simply give people a payment with their test results. One might pay more for a positive result. This is very weird because it might encourage all sorts of perverse behaviors, like people getting tested over and over again although they know their result could not have changed. Nevertheless, is the public health benefit worth it?
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