Medical research data is heterogeneous, which is why there cannot be a single infrastructure solution for all clinical research questions. The NUM has established specialised platforms for different types of data and treatment settings, which operate in accordance with the FAIR principles and are open to the entire scientific community. Here you will find everything you need to know about these infrastructures, the projects built upon them, the subject- and organ-specific working groups (FOSA), and the opportunities for researchers to make use of the network.