This international meeting under the auspices of European Federation of the Immunological Societies and Immunology Letters journal was dedicated to the standardization of innate lymphoid cells phenotyping and establishment of pan European collaboration between different research laboratories. Participants from Spain, Germany, Hungary, United Kingdom, France, Italy, Albania and Serbia met at the Institute for the Biological Research (IBISS) for the first time. The meeting was organized by IBISS immunologists led by Dr. Ivana Stojanović.