FIG 1.

Outbreak development. (A) Ground floor layout of the long-term-care facility. Each sector and room numbers are indicated. The depicted situation corresponds to 15 December 2020. Colors indicate infection status at different time points during the initial phases of the outbreak and the corresponding SARS-CoV-2 cluster. (B) Chronology of outbreak events and cases. For each case detected among residents and workers, the date of sample collection and the SARS-CoV-2 cluster detected are indicated. The period with a yellow background corresponds to the time of resident relocations according to their infection status (phase III of the outbreak).