- COVID-19 in a Long-Term Care Facility – King County, Washington, February 27-March 9, 2020
- Evaluation of the Effectiveness of Surveillance and Containment Measures for the First 100 Patients with COVID-19 in Singapore – January 2-February 29, 2020
- Active Monitoring of Persons Exposed to Patients with Confirmed COVID-19 – United States, January-February 2020