Vaginal seeding
BMJ article http://www.bmj.com/content/352/bmj.i227

suggestion that babies born as result of CS don’t have the same microbe make up
http://www.cell.com/trends/molecular-medicine/abstract/S1471-4914(14)00216-0?_returnURL=http%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS1471491414002160%3Fshowall%3Dtrue
and
hygeine hypothesis
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3110651/
http://www.ncbi.nlm.nih.gov/pubmed/?term=20566857
Other studies have linked different microbes to increased risks of some disorders (increased risk not diagnosis)

http://www.jacionline.org/article/S0091-6749(14)01650-9/abstract

Nature study
http://www.readcube.com/articles/10.1038%2Fnm.4039

HEALTH CHECKS/ ONE YOU

http://www.nhs.uk/Conditions/nhs-health-check/Pages/NHS-Health-Check.aspx