Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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More than 4.4billion prescriptions were dispensed within the United States in 2016.
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If you could remove all of your skin, it would weigh up to 5 pounds.
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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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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
A lobe-finned fish, the coelacanth (Latimeria chalumnae)
Structure of fish gills.
While fish-oil supplements contain omega-3 fatty acids, excessive amounts can be unhealthy for some
Cartilaginous Framework of the Nose
Structure and function of the gills of a bony fish.