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Control of infectious diseases has resulted from clean water and improved sanitation. Infections such as typhoid and cholera transmitted by contaminated water, a major cause of illness and death early in the 20th century, have been reduced dramatically by improved sanitation. In addition, the discovery of ______________ therapy has been critical to successful public health efforts to control infections such as tuberculosis and sexually transmitted diseases (STDs).

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Since 1900, safer and healthier foods have resulted from decreases in microbial contamination and increases in nutritional content. Identifying essential micronutrients and establishing food-fortification programs have almost ____________ major nutritional deficiency diseases such as rickets, goiter, and pellagra in the United States.

American Heritage Dictionary of the English Language (5th Edition, 2016) has defined "Public Health" as: "The science and practice of protecting and improving the health of a community, as by preventive medicine, health education, control of communicable diseases, application of sanitary measures, and _____________ of environmental hazards."

RandomHouseKernermanWebster'sCollegeDictionary(2010)hasdefined"PublicHealth"as:"Healthservicestoimproveandprotectcommunityhealth,esp.preventivemedicine,immunization,and _____________."

Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health (7th Edition, 2003) has defined "Public Health" as: "The field of health science that is concerned with safeguarding and improving the physical, mental, and __________ well-being of the community as a whole."