Hoang, P. M. V.; Ung, T. H.; Nguyen, H. K. L.; Nguyen, T. T.; Le, T. T.; Nguyen, S. V.; Nguyen, A. P.; Tran, H. T. T.; Vuong, C. D.; Le, M. Q. Missed Detections of Influenza A(H1)pdm09 by Real-Time RT–PCR Assay Due to Haemagglutinin Sequence Mutation, December 2017 to March 2018, Northern Viet Nam. Western Pac Surveill Response J 2019, 10.