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Volume 28, Number 3—March 2022
Dispatch

Return of Norovirus and Rotavirus Activity in Winter 2020‒21 in City with Strict COVID-19 Control Strategy, China

Martin Chi-Wai ChanComments to Author 
Author affiliation: Independent research scientist, Hong Kong, China

Main Article

Figure

Positive rates for 5 common viral causes of acute gastroenteritis in stool specimens and total number of specimens tested from routine, territorywide, PCR-based laboratory syndromic surveillance data, Hong Kong, China, January 2013‒September 2021. A) Monthly positive rates. Data for sapovirus, astrovirus, and enteric adenovirus were available for May 2017 onwards. The first imported COVID-19 case (blue dot) was reported on January 23, 2020, and the first locally acquired case (red dot) was reported on February 4, 2020. COVID-19 was declared pandemic by the World Health Organization on March 11, 2020. Colored horizontal bars indicate the periods of major nonpharmaceutical interventions for COVID-19 in the city, including universal mask-wearing outside homes (aqua), prohibition on group gatherings of >4 persons in public places (red), work-from-home arrangement for civil servants (blue), and school dismissal (purple). Pink indicates time of the COVID-19 pandemic. B) Monthly number of stool specimens tested. COVID-19, coronavirus disease.

Figure. Positive rates for 5 common viral causes of acute gastroenteritis in stool specimens and total number of specimens tested from routine, territorywide, PCR-based laboratory syndromic surveillance data, Hong Kong, China, January 2013‒September 2021. A) Monthly positive rates. Data for sapovirus, astrovirus, and enteric adenovirus were available for May 2017 onwards. The first imported COVID-19 case (blue dot) was reported on January 23, 2020, and the first locally acquired case (red dot) was reported on February 4, 2020. COVID-19 was declared pandemic by the World Health Organization on March 11, 2020. Colored horizontal bars indicate the periods of major nonpharmaceutical interventions for COVID-19 in the city, including universal mask-wearing outside homes (aqua), prohibition on group gatherings of >4 persons in public places (red), work-from-home arrangement for civil servants (blue), and school dismissal (purple). Pink indicates time of the COVID-19 pandemic. B) Monthly number of stool specimens tested. COVID-19, coronavirus disease.

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Main Article

1Current affiliation: Independent Research Scientist, Hong Kong, China.

Page created: January 12, 2022
Page updated: February 21, 2022
Page reviewed: February 21, 2022
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