The microbiome, the invisible jungle that inhabits our body, is much more than a mere collection of bacteria, viruses, fungi, or parasites: it is a vital ecosystem that shapes our health, our immunity, and even the way our brain functions. June 27 is International Microbiome Day — an opportunity to present here several ongoing research projects at the Institut Pasteur, as the institute launches its major federated research program on the microbiome (Integrative Microbiome Program at Pasteur).

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