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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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In 1844, Charles Goodyear obtained the first patent for a rubber condom.

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About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.

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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

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There are 60,000 miles of blood vessels in every adult human.

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