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Allergies play a major part in the health of children. The most prevalent childhood allergies are milk, egg, soy, wheat, peanuts, tree nuts, and seafood.

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The longest a person has survived after a heart transplant is 24 years.

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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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Medication errors are more common among seriously ill patients than with those with minor conditions.

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

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