CRESCENDO is a Transdisciplinary Doctoral Program managed by the University of Naples Federico II through its Task Force on Microbiome Studies. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie programme (Grant Agreement No. 101034245). CRESCENDO will recruit 10 international Early-Stage Researchers (ESRs-PhDs) who will be involved in research and training in the Microbiome field.