Animal Medical Testing Reading4.docx - A Animals are often...

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A Animals are often used in the testing of medicines and medical procedures prior to trials involving humans. Scientists test the efficacy and safety of treatments using animals to simulate the possible effects on humans. This method of testing treatments has been employed for over two thousand years, with the earliest known references to animal testing dating back to the 4th century BCE. Even Aristotle, the famous Greek philosopher and scientist, wrote about his experiments involving medical procedures on living animals. Since then, animals have been used extensively in testing various medical treatments throughout the world. One of the most dramatic instances of animal medical testing was Dr. Jonas Salk’s discovery of a vaccine for polio in the early 1950s. At the time, polio was one of the most feared diseases, killing thousands every year and infecting many times more, with those lucky enough to survive often left with severe disabilities. Before testing his vaccine on humans, Salk experimented on rhesus monkeys, purposefully exposing them to the virus in order to determine if they had been made immune by the vaccine. Once available to the public, Salk’s vaccine was a massive success and has been credited with saving countless lives.
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