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Did you know?
Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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The longest a person has survived after a heart transplant is 24 years.
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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.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.