Effect of Nonpharmaceutical Interventions in Preventing COVID-19 on the Circulation of Avian Influenza Virus in Wuhan, Hubei Province, China

Figure 2

Differences in AIV positive rates (%) by implementing NPIs. (a) The X-axis represents different monitoring sites, and the Y-axis represents positive rates (%). (b) The X-axis represents different sample types, and the Y-axis represents positive rates (%). (c) The X-axis represents the origins of different birds, and the Y-axis represents positive rates (%). The red bar represents coexistence of H5 and H9, the blue bar represents Untyped samples, the yellow bar represents H9 subtype, and the green bar represents H5 subtype. The non-NPIs correspond to the stage before COVID-19, and the NPIs correspond to the stage after COVID-19. The period from January 2018 to January 2020 was defined as before COVID-19, while the period from June 2020 to December 2022 was defined as after COVID-19. The non-H5/7/9 subtypes were referred to as Untyped. The chi-square test was used to analyze the significant difference. Statistical significance was considered at . Asterisks represent statistically significant differences between different groups: , , and .

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