Volume 29, Number 9—September 2023
Dispatch
Emergence of GII.4 Sydney[P16]-like Norovirus-Associated Gastroenteritis, China, 2020–2022
Figure 1
![Emergence of recombinant GII.4 Sydney[P16] norovirus associated with acute gastroenteritis among children treated as outpatients in Shanghai, before and during COVID-19 pandemic, Shanghai, China, during January 2016–March 2022. A) Numbers of cases of norovirus-associated acute gastroenteritis. Red arrow indicates an abrupt increase in norovirus activity. B) Genotype (polymerase-capsid) distribution of norovirus. Different norovirus genotypes are indicated by color (key). Start date of COVID-19 pandemic declared by World Health Organization was March 11, 2020; absent labels indicate period (September–December 2019) during which fecal sample collection was paused.](/eid/images/23-0383-F1.jpg "Figure 1. Emergence of recombinant GII.4 Sydney[P16] norovirus associated with acute gastroenteritis among children treated as outpatients in Shanghai, before and during COVID-19 pandemic, Shanghai, China, during January 2016–March 2022. A) Numbers of cases of norovirus-associated acute gastroenteritis. Red arrow indicates an abrupt increase in norovirus activity. B) Genotype (polymerase-capsid) distribution of norovirus. Different norovirus genotypes are indicated by color (key). Start date of COVID-19 pandemic declared by World Health Organization was March 11, 2020; absent labels indicate period (September–December 2019) during which fecal sample collection was paused.")
Figure 1. Emergence of recombinant GII.4 Sydney[P16] norovirus associated with acute gastroenteritis among children treated as outpatients in Shanghai, before and during COVID-19 pandemic, Shanghai, China, during January 2016–March 2022. A) Numbers of cases of norovirus-associated acute gastroenteritis. Red arrow indicates an abrupt increase in norovirus activity. B) Genotype (polymerase-capsid) distribution of norovirus. Different norovirus genotypes are indicated by color (key). Start date of COVID-19 pandemic declared by World Health Organization was March 11, 2020; absent labels indicate period (September–December 2019) during which fecal sample collection was paused.
1These authors contributed equally to this article.
Page created: June 29, 2023
Page updated: August 20, 2023
Page reviewed: August 20, 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.
Content Credential
