Terminology

mHealth: an abbreviation for mobile health, a term used for the practice of medicine and public health supported by mobile devices
Encounter: having been at or below a distance from another person at the same time t during a period >= p
Transmission tracing: mapping how the virus spreads; either through person-to-person transmission, or through environmental transmission
Contact: an encounter that really resulted in close interaction between two or more people
Cluster: concentration of people in a perimeter, or in a vehicle, either simultaneous or over time
Point-of-Interest: a perimeter or building for which we want to monitor the visits
Movements: movement of people between two points
Path: a calculated route based on GPS measurements
Visit: having been at a given point-of-interest, either in open sky or in a building
Hotspot: Cluster with infections above a given threshold
Exposure: Contact with a possibly infectious person, approximated through an encounter with an infectious subject
Spreader: A subject who is the source or possible source of multiple infections. I.c. a person appearing in multiple Exposures and/or appearing in multiple Hotspots.

Expected outcomes

Determine ‘encounters’, i.e. having been at or below a distance d from another person at the same time t during a period >= p.
- Based on: movements paths crossing each other
- Used for:
  - Giving context to BLE ‘encounters’
  - Determining who has had risk-full encounters
Give context to encounters (open space, building, kind of activity, …)
Determine ‘visits’, i.e. having been at a given point-of-interest, either in open sky or in a building.
- Based on:
  - multiple location measurements in a perimeter/geofence
  - interruption of location measurements at a given location (entrance to a building)
- Used for:
  - identifying possible locations where environmental transmission occurs
  - proxy for non-users in shops, kinder-garten, …
Identifying clusters of people (either simultaneous or spread over time) over a given threshold of people per time lapse. These could evolve into Points-of-Interest.
- ‘Shop’
- ‘Provincial Domain’
- ‘Neighborhood party’
- Not: ‘Garden party’
Identifying movements between Clusters.
- With diagnostic data added
  - Identify exposures
  - Identify hotspots
  - Identify spreaders
- Aggregated
  - A map of the spread of the infections

Personal data (ie data that are not strictly anonymous) can not leave the device, or a personal vault, without the consent of the user.
Such consent should only be asked when there is a strong indication that the individual is infectious.

What is sufficient anonymisation of location data?

Transmission Tracing Types
- Encounters, Visits, Movements and Symptoms
Human Contact Tracing (HCT)
Primary Care relationship
Testing, Isolation, Quarantining Organisation
Epidemiologic surveillance
Research
Autonomous Contact Tracing (ACT)
Solution
- The sum of processes and technologies (components, frameworks, hardware) that make up a …
Scenario
- A combination of solutions
System
- Set of applications, processes and conventions that fulfills a purpose. (example: Human Contact Tracing)
Technology
- Building blocks for building applications. (eg DP3T, Apple/Google framework, …)
Accuracy
Dependability
Speed
Interoperability
Privacy