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Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.
Did you know?
Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.
Did you know?
The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
Did you know?
Excessive alcohol use costs the country approximately $235 billion every year.
Did you know?
The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.