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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.
Blood is approximately twice as thick as water because of the cells and other components found in it.
It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.
There are 20 feet of blood vessels in each square inch of human skin.