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Vaccines prevent between 2.5 and 4 million deaths every year.
Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
The Centers for Disease Control and Prevention has released reports detailing the deaths of infants (younger than 1 year of age) who died after being given cold and cough medications. This underscores the importance of educating parents that children younger than 2 years of age should never be given over-the-counter cold and cough medications without consulting their physicians.
Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.