Earlier quoted context omitted.
You go in after hours when the risk of contact is minimal.
You really think they are going to bother to be open beyond 9-5 and maybe not even weekends? Also with the air-conditioner on exhaust and the people taking swaps without protective gear, or even with, moving the virus from car to car so efficiently. Look at this crazy photo: first guy is leaning into the car with facemask down. Totally going to happen at half the Walmarts. https://static01.nyt.com/images/2020/03/12/u…
Then people who are to be tested and are in quarantine at home (mostly after visiting affected areas in Italy and elsewhere or by being traced to someone infected) make appointments over phone, then arrive by private car at the designated time.
They will actually not set foot in the tent, instead a swab sample is taken by a medic in full hazmat suit. The tent houses the medic & sample handling equipment.
The people who have been tested then return to quarantine at home and wait for the results.
This is also compounded by a dedicated ambulance with team in full protective gear that takes samples from people at home.