13 Aug 2019 --- Whether a child is born by vaginal delivery or Caesarian section has a major influence on shaping the microbiome, proposes new research in the Journal of Investigative Dermatology. The maturation of skin microbial communities is key to skin health in children, and for the development of the adult immune system. Additionally, the bacterial population of a child’s skin is more similar to that of their mother’s than to a stranger’s.