Figure 4.
Chronological order of events of the first COVID-19 outbreak at the Ludwig-Maximilian Klinikum, Munich, February–May 2020 (n = 12)
COVID-19: coronavirus disease; HCW: healthcare workers; NIV: Non-invasive ventilation; SARS-CoV-2: severe acute respiratory syndrome coronavirus 2.
The timeline summarises the events involving patients and HCW in a presumed nosocomial outbreak between 26 February and 26 March 2020. Yellow boxes: onset of symptoms; red boxes: date of first positive SARS-CoV-2 PCR result, the length of box does not correspond to the duration of PCR-positivity; blue circle: first time point and risk category of the contact to the index person (Patient 0). The risk category of the contact is indicated within the blue circle (CI or CIII, none of these contacts was defined as risk category II). Cases are shown in three groups (Clusters 1, 2 and 3) based on the findings shown in the subsequent phylogenetic analysis. HCW included five nurses and two doctors.
