This article is from the Scientific Skepticism FAQ, by Paul Johnson Paul@treetop.demon.co.uk with numerous contributions by others.
People have died when alternative practitioners told them to stop
taking conventional treatment. Children have died when their parents
refused to give them conventional treatment. These issues matter.
Most alternative treatments are harmless, so the "complementary
medicine" approach where conventional and alternative therapies
proceed in parallel will not hurt anyone physically (although it is a
waste of time and money).
 
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