Confirmed COVID-19 Cases per Economic Activity during Autumn Wave in Belgium., Verbeeck, Johan, Vandersmissen Godelieve, Peeters Jannes, Klamer Sofieke, Hancart Sharon, Lernout Tinne, Dewatripont Mathias, Godderis Lode, and Molenberghs Geert , Int J Environ Res Public Health, 2021 11 27, Volume 18, Issue 23, (2021)