This Summer School is designed for PhD students interested in host-microbe symbioses to acquire an in depth understanding of the field from diverse perspectives through the interaction with experts in this research area. These include researchers using different model systems, and levels of analysis from molecular biology, to ecology and evolution. The Summer School will have an emphasis on functionally understanding these symbioses, with approaches including genomics and metabolomics. The students will acquire critical knowledge for their future choice of research direction.