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Vaccines prevent between 2.5 and 4 million deaths every year.
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The horizontal fraction bar was introduced by the Arabs.
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Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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Automated pill dispensing systems have alarms to alert patients when the correct dosing time has arrived. Most systems work with many varieties of medications, so patients who are taking a variety of drugs can still be in control of their dose regimen.