Dynamically updating electronic medical records and leveraging a person's path in a facility to mitgate risks

Automatically updating an electronic medical record in response to an exposure to a communicable disease is disclosed. A system receives data indicating a common reference point of exchange for a first person and for a second person. The system further detects an update to an electronic medical record of the first person where the update includes a diagnosis of a communicable disease. The data indicating the common reference point and the communicable disease is used to determine an exposure of the second person to the communicable disease. Upon determining such exposure, an electronic medical record for the second person is updated to reflect the exposure to the disease.