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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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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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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.