Research breakthrough on body's immune system

Research breakthrough on body's immune system   
http://www.adelaide.edu.au/news/news37362.html

"Inflammatory bowel diseases and a lot of other autoimmune diseases are common in Western cultures but are rarely found in the developing or Third World countries.
 
"We need to look at our diet and also the obsession in Western countries with cleanliness and antibacterial disinfectants, which has gone overboard..."