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Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.
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The longest a person has survived after a heart transplant is 24 years.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.
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There are actually 60 minerals, 16 vitamins, 12 essential amino acids, and three essential fatty acids that your body needs every day.