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Vaccines prevent between 2.5 and 4 million deaths every year.
There are 20 feet of blood vessels in each square inch of human skin.
Atropine was named after the Greek goddess Atropos, the oldest and ugliest of the three sisters known as the Fates, who controlled the destiny of men.
Women are 50% to 75% more likely than men to experience an adverse drug reaction.
The longest a person has survived after a heart transplant is 24 years.
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