I. Health Surveillance: Defining the Categories A. Aggregate Level Analysis B. Individual Level Analysis 1. Contact-Tracing a. Government Monitoring b. Contract Tracing Apps 2. Quarantine Monitoring and Other Enforcement Mechanisms 3. Screenings II. Whether to Compel? A. The Legal Issues 1. The Fourth Amendment—A Limited Constraint 2. Special Needs Searches a. The Tailoring Question b. The Degree of Intrusion 3. Targeted Surveillance 4. Voluntary Data Disclosure Regimes III. The Policy Considerations Conclusion Notes & Questions