Sorry if this has been covered elsewhere. The article is new but the research it's based on is a few years old. http://theconversation.com/east-afr...crobiome-is-an-ecological-disaster-zone-73668 Excerpt: Recent research has shown that disease is often associated with a fall in microbial diversity. What we don’t know is which way cause and effect runs. Does disease cause a drop in microbial diversity or does a drop in diversity cause – or precede – disease? Based on this research I think: http://www.nature.com/articles/ncomms4654 Just a side note. Somewhere down the article it talks about antibiotic use. This is an issue I find rather important. I know many here take/have taken AB's and the desperation that leads to doing that. But taking them without being sure of the need or taking them on a schedule not recommended can lead to health gains perhaps but also disaster for the individual and much more widely.