Accepted for Publication: January 14, 2022.
Published Online: February 3, 2022. doi:10.1001/jama.2022.0818
Corresponding Author: Hidechika Akashi, MD, PhD, MPH, DTM&H, National Center for Global Health and Medicine, 1-21-1 Toyama, Shinjuku-ku, Tokyo 162-8655, Japan (hakashi@it.ncgm.go.jp).
Author Contributions: Dr Akashi 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: Akashi, Shimada, Chinda, Kokudo.
Acquisition, analysis, or interpretation of data: Akashi, Tamura, Kokudo.
Drafting of the manuscript: Akashi, Chinda.
Critical revision of the manuscript for important intellectual content: Akashi, Shimada, Tamura, Kokudo.
Statistical analysis: Akashi, Tamura.
Administrative, technical, or material support: Shimada, Kokudo.
Supervision: Shimada, Kokudo.
Conflict of Interest Disclosures: None reported.
Additional Contributions: We thank all National Center for Global Health and Medicine contributors, including Yasunori Ichimura, MD, MPH, PhD, for feedback on an early version (no compensation), Shoichiro Negishi, BA, for supporting the final compilation of the data (no compensation), Nobuaki Inoue, MD, MPH; Tomoo Ito, MD; Motoyuki Tsuboi, MD, DTM&H, MSc; Rei Haruyama, MD, MSc; and Yoshiki Koizumi, MD, for collecting daily data and other information in the area for testing of close contacts (no compensation), who were also assigned to the Tokyo 2020 Organising Committee for supporting Olympic and Paralympic Games operation, and Caryn Jones, BSc (ThinkSCIENCE), for English-language editing (with compensation).