Assume that you and everyone who enters the office has COVID-19 and operate with that assumption in mind. Wear a mask, stay at least 2 meters (6 feet) away from people, space chairs out in waiting area so that they are six feet apart, wear gloves at all times, don’t wear the same clothes two days in a row, change out of and wash your clothes as soon as you get home. If you take off your gloves, wash your hands using proper technique right away. Use Lysol wipes or disinfectant spray to clean commonly touched areas several times a day. Open windows to air out the building. If the patient is not wearing a mask, give them a mask when they arrive. Have hand sanitizer available at the door and ask them to use hand sanitizer as soon as they arrive.
Many of these suggestions are what the Chinese government has asked us to do while we are under home quarantine.