The development of the gut microbiota occurs early in life. As outlined in this Review by Isolauri and colleagues, the initial microbial colonization of the gut, and indeed of the rest of the human body, is a stepwise process and interactions between these colonizing bacteria and the human host ultimately have a key influence on health and disease.
- Samuli Rautava
- Raakel Luoto
- Erika Isolauri
