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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.
Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.