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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 |
| Institution: | China Animal Health and Epidemiology Center, Qingdao, 266032, China |
| Abstract: | Highlights 1. 13 strains of H7N9 viruses from laying hens in 2020 and 2021 were identified. 2. H7N9 viruses in China comprised at least 11 genotypes. 3. H7N9 viruses are high pathogenic in chickens, not in ducks. 4. The most H7N9 viruses cross-reacted poorly with H7-Re3 antiserum. 5. The H7-Re3 vaccine was unable to prevent H7N9 infection. |
| Keywords: | , , , , |
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