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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.
Colchicine is a highly poisonous alkaloid originally extracted from a type of saffron plant that is used mainly to treat gout.
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
The human body produces and destroys 15 million blood cells every second.
More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.