Many people don't eat healthy food that results in medical problems, disease and loss of life expectancy. I know several people personally whose diets are really just an adjunct to their alcohol and drug consumption. They barely eat, let alone do they eat healthy food. When they eat, it is a hot dog or chips. Yet, they are wandering around out there with the rest of us. This is a Public Health issue. Similarly, one wonders how many issues are unknown in our decision to live in the artificial environments of our cities. Our bodies were developed for living in consonance with the outside environment. The great progress of human society has been the result of the great progress of public health programs. The deal is to prevent problems before they can establish themselves. It's far cheaper than treating each individual a la medicine.
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