Serological Surveillance of the H1N1 and H3N2 Swine Influenza A Virus in Chinese Swine between 2016 and 2021

Figure 1

2016-2021 IAV-S serological test results in different provinces of mainland. The number of serum in different provinces was counted, and the relative proportion of various subtypes in different provinces was illustrated by pie chart. Different colors represent different provinces and subtypes. Data for 17 provinces of China are presented as follows. LN: Liaoning ; NM: Neimenggu ; HeB: Hebei ; SX: Shanxi ; SD: Shandong ; GS: Gansu ; SaX: Shaanxi ; HuB: Hubei ; HeN: Henan ; AH: Anhui ; JS: Jiangsu ; SC: Sichuan ; CQ: Chongqing ; GZ: Guihou ; GX: Guangxi ; GD: Guangdong ; XZ: Xizang .