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Your heart beats over 36 million times a year.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.
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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).