There are approximately 3 million unintended pregnancies in the United States each year.
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The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.
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Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.
Palade's use of the pulse-chase method to study protein secretion
Leonardo da Vinci, Study of Human Proportion: The Vitruvian Man.
Leonardo da Vinci, Study of Human Proportion: The Vitruvian Man.
Grade 11 Chem Questions
Transmission genetics began with the study of pea plants.