Measuring close proximity interactions in summer camps during the COVID-19 pandemicElia Leoni, Giulia Cencetti, Gabriele Santin, Timofei Istomin, Davide Molteni, Gian Pietro Picco, Elisabetta Farella, Bruno Lepri and Amy L. MurphyEPJ Data Sci., 11 1 (2022) 5DOI: https://doi.org/10.1140/epjds/s13688-022-00316-y