Operating room air delivery design to protect patient and surgical site results in particles released at surgical table having greater concentration along walls of the room than at the instrument tray

•Modern air handling systems for operating rooms protect the patient and surgical team.•Concentrations of air particles are greater along walls than at the instrument table.•Fewer particles are found at the center of the operating room.•Stepping 2 m away from patient would not protect personnel in operating rooms. BackgroundDuring the coronavirus disease 2019 (COVID-19) pandemic, recommendations have included that personnel not involved in...