Fig. 1: Visualization of contact tracing and returned line list data when an outbreak happened in a specific venue in Hong Kong.

The figure describes an outbreak was first occurred in a bar, with cases A to E (as indicated by pink dots) identified, then contact tracing found subsequent household infectees (cases F to H, indicated by green dots) generated by case E, and subsequent infectees (cases I and J, indicated by orange dots) generated by case C in a restaurant. The table at right side showed how these cases were entered into the line list with transmission cluster information presented.