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Did you know?
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).
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More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.