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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.
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For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.