1. A method comprising: capturing three dimensional images of a person and a patient within a room; tracking the location of the person within the room; determining whether the person is in close proximity to or in contact with the patient by determining the relative positions of the three dimensional images; determining whether the person has actuated a sanitizing device, and determining whether a caution or warning signal should be generated based on whether the person in close proximity or in contact with the patient has actuated the sanitizing device.