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Continued antigenic variation of highly pathogenic avian influenza A (H7N9) virus in laying hens in China, 2020–2021 |
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| Authors: | Wenming Jiang Xin Yin Shuo Liu Shaobo Liang Cheng Peng Guangyu Hou Jinping Li Xiaohui Yu Yang Li Jingjing Wang Hualei Liu |
| Affiliation: | China Animal Health and Epidemiology Center, Qingdao, 266032, China |
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