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Volume 31, Number 11—November 2025

Research

Community-Driven, Text Message–Based COVID-19 Surveillance System, Los Angeles County, California, USA, 2020–2024

Jordan B. Braunfeld, Elizabeth Traub, Howard Chiou, Aryana T. Amoon, Christina Collins, Allison Joyce, Justin Buendia, Prabhu Gounder, and Annabelle de St. Maurice
Author affiliation: Centers for Disease Control and Prevention, Atlanta, Georgia, USA (J.B. Braunfeld); Los Angeles County Department of Public Health, Los Angeles, California, USA (J.B. Braunfeld, E. Traub, H. Chiou, A.T. Amoon, C. Collins, A. Joyce, J. Buendia, P. Gounder, A. de St. Maurice)

Main Article

Figure 1

Survey question and response flow for the Angelenos in Action community-driven, text message-based COVID-19 surveillance system used in Los Angeles County, California, USA, 2020–2024. Red represents response pattern that results in the designation of COVID-like illness.

Figure 1. Survey question and response flow for the Angelenos in Action community-driven, text message-based COVID-19 surveillance system used in Los Angeles County, California, USA, 2020–2024. Red represents response pattern that results in the designation of COVID-like illness.

Main Article

Page created: September 23, 2025
Page updated: November 26, 2025
Page reviewed: November 26, 2025
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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