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Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.