In the specific case of COVID-19, you might ask that patients agree to cancel their booking if they become ill.
Save those settings, and your patients will see something like this before they place their booking:
If they don't tick the "I accept" box, they won't be able to place their booking:
If you don't already have online bookings enabled, head over here to learn how to set them up. As aways, our support team is here to assist if you need anything!