Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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The training of an anesthesiologist typically requires four years of college, 4 years of medical school, 1 year of internship, and 3 years of residency.
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About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.
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The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.
Types of plastids
Major types of microbial cell shapes.
A tamed cheetah offered as tribute to the King of Thebes (1700 B.C.)