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Did you know?
The longest a person has survived after a heart transplant is 24 years.
Did you know?
About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
Did you know?
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
Did you know?
There are more bacteria in your mouth than there are people in the world.
Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.