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According to animal studies, the typical American diet is damaging to the liver and may result in allergies, low energy, digestive problems, and a lack of ability to detoxify harmful substances.

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About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.

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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

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Most fungi that pathogenically affect humans live in soil. If a person is not healthy, has an open wound, or is immunocompromised, a fungal infection can be very aggressive.

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According to the American College of Allergy, Asthma & Immunology, more than 50 million Americans have some kind of food allergy. Food allergies affect between 4 and 6% of children, and 4% of adults, according to the CDC. The most common food allergies include shellfish, peanuts, walnuts, fish, eggs, milk, and soy.

Cnidarians have specialized stinging cells called cnidocytes Cnidarians have specialized stinging cells called cnidocytes
Endocarditis. The human heart has been sectioned to reveal the left ventricle and origin of the aort Endocarditis. The human heart has been sectioned to reveal the left ventricle and origin of the aort
Angioplasty. One form is called balloon angioplasty, shown here. A balloon catheter is threaded into Angioplasty. One form is called balloon angioplasty, shown here. A balloon catheter is threaded into
Electrocardiography. (a) Electrodes are placed on the patient’s chest to record the electrical event Electrocardiography. (a) Electrodes are placed on the patient’s chest to record the electrical event
Five layers or sheaths called koshas in Ayurvedic philosophy. Five layers or sheaths called koshas in Ayurvedic philosophy.
A commercially available DNA microarray, called a GeneChip, marketed by Affymetrix, Inc A commercially available DNA microarray, called a GeneChip, marketed by Affymetrix, Inc
Video: Normal and abnormal blood pH

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