Haag, C., Höglinger, M., Moser, A., Hämmig, O., Puhan, M.A. and von Wyl, V. 2020. Social mixing and risk exposures for SARS-CoV-2 infections in elderly persons. Swiss Medical Weekly. 150, 4950 (Dec. 2020), w20416. DOI:https://doi.org/10.4414/smw.2020.20416.