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Colon cancer is the second leading cause of cancer death in the United States, reports the National Cancer Institute. It’s important to begin screening for colorectal cancer starting around age 50. Your doctor can use a colonoscopy to check for cancerous growths in your colon. They will also check for polyps, a type of noncancerous growth. Certain types of polyps can develop into cancer at a later time. Ask your doctor how often you should have a colonoscopy conducted.
The great positive impact of public health programs is widely acknowledged. Due in part to the policies and actions developed through public health, the 20th century registered a decrease in the mortality rates for infants and children and a continual increase in life expectancy in most parts of the world. For example, it is estimated that life expectancy has increased for Americans by thirty years since 1900,[54] and worldwide by six years since 1990.[55]

The Health app highlights four categories: Activity, Sleep, Mindfulness, and Nutrition. Each plays an important role in your overall health — and in the app. Health suggests great apps from each category to get you going, and the Today view shows all your stats at a glance to help you stay on track. Once you start using the Health app, there’s no stopping you.

The meaning of health has evolved over time. In keeping with the biomedical perspective, early definitions of health focused on the theme of the body's ability to function; health was seen as a state of normal function that could be disrupted from time to time by disease. An example of such a definition of health is: "a state characterized by anatomic, physiologic, and psychological integrity; ability to perform personally valued family, work, and community roles; ability to deal with physical, biological, psychological, and social stress".[7] Then in 1948, in a radical departure from previous definitions, the World Health Organization (WHO) proposed a definition that aimed higher: linking health to well-being, in terms of "physical, mental, and social well-being, and not merely the absence of disease and infirmity".[8] Although this definition was welcomed by some as being innovative, it was also criticized as being vague, excessively broad and was not construed as measurable. For a long time, it was set aside as an impractical ideal and most discussions of health returned to the practicality of the biomedical model.[9]
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