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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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Asthma attacks and symptoms usually get started by specific triggers (such as viruses, allergies, gases, and air particles). You should talk to your doctor about these triggers and find ways to avoid or get rid of them.
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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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The horizontal fraction bar was introduced by the Arabs.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.