1.
Zhang D, Zhang Y, Yang P, Zhang Z, Wang Q. Two clustered cases of confirmed influenza A(H7N9) virus infection, Beijing. Global Biosecurity [Internet]. 2019 Jun. 2 [cited 2025 Dec. 5];1(1). Available from: https://www.jglobalbiosecurity.com/index.php/up-j-gb/article/view/30