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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.
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.