1. World Health Organization. Available: https://www.who.int/dg/speeches/detail/who-director-general-s-opening-remarks-at-the-media-briefing-on-covid-19-11-march-2020
2. Istituto Superiore di Sanità. Available: https://www.epicentro.iss.it/coronavirus/sars-cov-2-sorveglianza-dati