Porcine Respiratory and Reproductive Syndrome Virus Variants, Vietnam and China, 2007
Youjun Feng, Tiezhu Zhao, Tung Nguyen, Ken Inui, Ying Ma, Thi Hoa Nguyen, Van Cam Nguyen, Di Liu, Quang Anh Bui, Long Thanh To, Chuanbin Wang, Kegong Tian , and George F. Gao
Author affiliations: Institute of Microbiology–Chinese Academy of Sciences, Beijing, People’s Republic of China (Y. Feng, Y. Ma, D. Liu, G.F. Gao); People’s Republic of China Animal Disease Control Center, Beijing (T. Zhao, C. Wang, K. Tian); National Center for Veterinary Diagnosis, Hanoi, Vietnam (T. Nguyen, T.H. Hguyen, V.C. Nguyen, L.T. To);
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