A classical definition of “public health” describes it as the art and science of preventing disease, prolonging life, and promoting physical and mental health, sanitation, personal hygiene, control of infection, and organization of health services. The practice of public health derives from dim antiquity, at least with respect to sanitation and personal hygiene, which was often done for religious purposes. The Greeks—including Hippocrates—in the 4th and 5th centuries BC, are considered the first to have applied logic and right reason to the causation of disease. The Middle Ages would see various plagues, and an organized response to control further outbreaks....