Neat News 500 (added 2017-05-14)
Change of the Gut Mircrobes against Post-Traumatic Stress

© Blausen.com staff. Blausen gallery [CC BY 3.0]
The gut contains microbes which have influence on the wellbeing of people. In experiments with mice it was posible to show that an immunization of the gut with a bacterium can reduce the exhibited anxiety in the mice.