Rapid nosocomial spread of SARS-CoV-2 in a French geriatric unit. (30th July 2020) - Vanhems, Philippe; Saadatian-Elahi, Mitra; Chuzeville, Michel; Marion, Elodie; Favrelle, Louise; Hilliquin, Delphine; Martin-Gaujard, Geraldine; Gourmelon, Robin; Noaillon, Mathilde; Khanafer, Nagham