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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.
If you could remove all of your skin, it would weigh up to 5 pounds.
Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.
There are more bacteria in your mouth than there are people in the world.
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