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Did you know?
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Did you know?
It is difficult to obtain enough calcium without consuming milk or other dairy foods.
Did you know?
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
Did you know?
Illicit drug use costs the United States approximately $181 billion every year.