Until recently, diagnostic testing for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the virus that causes coronavirus disease 2019 (COVID-19), was only available through public health laboratories.1- 3 This limited testing was prioritized for persons who had severe illness or identifiable risk factors, such as travel to an area with ongoing transmission. Thus, the incidence of community transmission by persons with mild illness and without risk factors remains ill-defined.
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CME Disclosure Statement: Unless noted, all individuals in control of content reported no relevant financial relationships. If applicable, all relevant financial relationships have been mitigated.
Corresponding Author: Brad Spellberg, MD, Los Angeles County + University of Southern California Medical Center, 2051 Marengo St, Los Angeles, CA 90033 (firstname.lastname@example.org).
Published Online: March 31, 2020. doi:10.1001/jama.2020.4958
Author Contributions: Dr Spellberg had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.
Concept and design: Spellberg, Haddix, Holtom, Yee, Gounder.
Acquisition, analysis, or interpretation of data: Spellberg, Haddix, Lee, Butler-Wu, Holtom, Gounder.
Drafting of the manuscript: Spellberg, Gounder.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Gounder.
Administrative, technical, or material support: All authors.
Supervision: Spellberg, Holtom, Yee, Gounder.
Conflict of Interest Disclosures: None reported.
Additional Contributions: We acknowledge the tireless surveillance efforts of Bessie Hwang, MD, MPH, and Emily Kajita, MS, MPH (both with the Department of Public Health Acute Communicable Disease Control Syndromic Surveillance Unit), and Elizabeth Traub, MPH (with the Department of Public Health Acute Communicable Disease Control Syndromic Respiratory Diseases Unit). None received additional compensation beyond salary.
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