Scientists study how the microbiome of mice’s skin forms to provide insight into our own

How the skin microbiome is established—in particular, why the immune system does not attack these bacteria—has been little studied. Now, a team led by researchers at the University of California, San Francisco (UCSF), has shown that, to establish tolerance by the immune system, colonization of the skin by commensal bacteria occurs during the first few days after birth in mice.