Table 2.

Epidemiologically-relevant behaviors captured in mobile phone data.

	What is captured?	What is not captured?
Spatially and temporally aggregated mobility (CDRs, GPS)	• Changes in population-level mobility and clustering behaviors in response to NPIs • Rates at which individuals move between locations • Potential transmission links between locations • Hourly or daily movements	• Changes in individual behavior, trajectories, or specific routes • Differences in how individuals use their phone • Distinction between movement with high vs low risk of transmission • Transmission chains within locations
Proximity networks (Bluetooth, contact tracing applications)	• Relationship between individual’s behavior and infection status • Fine-scale clustering and contact data	• Distinction between proximate individuals who are in direct contact or not in contact • Non-proximal interactions that may be involved in transmission