Figure 1  Scenarios for COVID-19 virus spread in workplace reopening: The Person-to-Person and Person-to-Place contact (left). Spatiotemporal representation of person-to-person contact boundaries is shown using two orange cylinders (right); spatiotemporal representation of person-to-place contact boundary in a room is shown using a blue cubic (right); and spatiotemporal representation of a room, people trajectories are shown as gray lines.