More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.
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The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.
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More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.
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The human body produces and destroys 15 million blood cells every second.
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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.
Genetic drift and population size.
Animal extinctions and human population growth.
A genetic bottleneck reduces a population temporarily to very low levels, removing much of its genet