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To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.
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Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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More than 4.4billion prescriptions were dispensed within the United States in 2016.
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According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.