Fig. 1

Floor plan and seating arrangement. a: Floor plan; b: Seating arrangement of affected team in the work area and in the conference room. Large coloured rectangles = desks (red: desk of the index case; orange: desks of team members with COVID-19 who fell ill until March 14; yellow: desks of team members with COVID-19 who fell ill after March 14; green: desks of team members who did not fall ill; blue: desks in conference room); Small blue rectangles = seats; Small blue circles = side seats