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More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.

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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.

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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

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Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

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