Upton Sinclair's famous novel, "The Jungle," was a scathing critique of the situation that existed in American factories in the beginning of the 20th century. The book highlighted the poor sanitation and worker standards that existed in meat packing and processing plants. As a result of the book Congress enacted two major pieces of legislation seeking to address the problems addressed in the book. The first was the "Meat Inspection Act", and the second was the "Pure Food and Drug Act of 1906."
I believe the answer is primary.
Efforts to discourage teenagers from smoking and efforts to encourage smokers to quit is an example of primary prevention.
Preventive measures encompass a wide range of "interventions" aimed at reducing hazards or threats to health. The primary, secondary, and tertiary categories of prevention might have come about in conversations between researchers and medical experts.
Primary prevention aims to thwart disease or injury before it even begins. To achieve this, dangerous or unhealthy habits must be changed, exposure to dangers that can cause disease or injury must be reduced, and resistance to disease or damage, should exposure occur, must be strengthened.
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