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Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.
Did you know?
The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
Did you know?
About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.
Did you know?
The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.
Did you know?
There are 60,000 miles of blood vessels in every adult human.