Continuous population-level monitoring of SARS-CoV-2 seroprevalence in a large metropolitan region Bằng Emmenegger, M, Cecco, ED, Lamparter, D, Jacquat, R, Riou, J, Menges, D, Ballouz, T, Ebner, D, Schneider, M, Morales, IC, Doğançay, B, Guo, J, Wiedmer, A, Domange, J, Imeri, M, Moos, R, Zografou, C, Batkitar, L, Madrigal, L, Schneider, D, Trevisan, C, Gonzalez-Guerra, A, Carrella, A, Dubach, I, Xu, C, Meisl, G, Kosmoliaptsis, V, Malinauskas, T, Burgess-Brown, N, Owens, R, Hatch, S, Mongkolsapaya, J, Screaton, G, Schubert, K, Huck, J, Liu, F, Pojer, F, Lau, K, Hacker, D, Probst-Müller, E, Cervia, C, Nilsson, J, Boyman, O, Saleh, L, Spanaus, K, von Eckardstein, A, von Eckardstein, A, Schaer, D, Ban, N, Tsai, C-J, Stuart, D