Volume 29, Number 6—June 2023
Research Letter
National Surveillance of Pediatric Acute Hepatitis of Unknown Etiology, Japan, October 2021–December 2022
Figure
![Cases of acute hepatitis of unknown etiology by week of onset in Japan, October 2021– December 31, 2022. The Ministry of Health, Labour, and Welfare Japan issued the working case definitions and administrative notice on April 27, 2022. In total, 139 probable cases with onset dates after October 1, 2021 (week 39, 2021), were reported as of December 31, 2022 (week 52, 2022). We excluded 6 cases for which onset dates were unavailable. Red outlines indicate cases fulfilling the diagnostic criteria for acute liver failure (n = 11).](/eid/images/22-1579-F1.jpg)
Figure. Cases of acute hepatitis of unknown etiology by week of onset in Japan, October 2021– December 31, 2022. The Ministry of Health, Labour, and Welfare Japan issued the working case definitions and administrative notice on April 27, 2022. In total, 139 probable cases with onset dates after October 1, 2021 (week 39, 2021), were reported as of December 31, 2022 (week 52, 2022). We excluded 6 cases for which onset dates were unavailable. Red outlines indicate cases fulfilling the diagnostic criteria for acute liver failure (n = 11).
Page created: April 13, 2023
Page updated: May 18, 2023
Page reviewed: May 18, 2023
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.