Approximately 500,000 babies are born each year in the United States to teenage mothers.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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In women, pharmacodynamic differences include increased sensitivity to (and increased effectiveness of) beta-blockers, opioids, selective serotonin reuptake inhibitors, and typical antipsychotics.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.
Ghostly experiment
How to integrate trigonometric functions containing even powers (Question 2)