Old Public Health originally targeted which approach?

• A. Providing high-cost specialized medical treatments
• B. Personal lifestyle coaching
• C. Genetic modification of populations
• D. Changing the physical environment to reduce infectious disease transmission

Answer: (D)

Old Public Health focuses on altering the environment to prevent disease from spreading. In the early public health era, governments and communities improved sanitation, clean water supply, sewage and waste disposal, housing quality, and urban planning. These population-level environmental changes reduce exposure to infectious agents and interrupt transmission, which dramatically lowered illness and death without relying on individual medical treatments.

That’s why changing the physical environment to reduce infectious disease transmission is the best fit. The other options describe approaches more associated with later shifts toward individual-focused care or advanced biotechnologies, rather than the environmental reforms that defined Old Public Health.