18 September 2011

A nocebo effect (opposite of placebo) is when beliefs harm your health. Article on Hmong men dying in their sleep - http://goo.gl/sZrZp
See also: Chinese Americans with star signs suggesting susceptibility to a particular illness died up to 5 years earlier than expected if they happened to get that illness - depending on how strongly they believed in astrology. 
(2100 words, Alexis Madrigal on Shelley Adler, The Atlantic)