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Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

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Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.

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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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Methicillin-resistant Staphylococcus aureus or MRSA was discovered in 1961 in the United Kingdom. It if often referred to as a superbug. MRSA infections cause more deaths in the United States every year than AIDS.

Methicilli ...
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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.

Orientation versus navigation. Orientation versus navigation.
Phidippus johnsoni chelicera (green) and pedipalps (bottom) Phidippus johnsoni chelicera (green) and pedipalps (bottom)
Application of an ostomy bag or pouch: E, A clamp is applied to the bottom of the bag once it is in Application of an ostomy bag or pouch: E, A clamp is applied to the bottom of the bag once it is in
This engraving of the Boston Massacre (1770) became the most reprinted depiction of the event, and p This engraving of the Boston Massacre (1770) became the most reprinted depiction of the event, and p
Instructions for Completing the CMS-1500 (02/12) Claim Form Instructions for Completing the CMS-1500 (02/12) Claim Form
Chinese Barber Performing a Form of Percussion on a Seated Patron in China in the 1790s. Chinese Barber Performing a Form of Percussion on a Seated Patron in China in the 1790s.
Video: Cell mediated immune response to a viral infection Animation

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