Emerging Enterovirus A71 Subgenogroup B5 Causing Severe Hand, Foot, and Mouth Disease, Vietnam, 2023.
Chau NVV., Thuong TC., Hung NT., Hong NTT., Quy DT., Thien TB., Hiep CM., Minh NNQ., Khanh TH., Han DDK., Truc THC., Ny NTH., Thanh LK., Nguyet LA., Thuy CT., Nhu LNT., Van Quang P., Nguyen PNT., Qui PT., Rogier van Doorn H., Thwaites CL., Thanh TT., Dung NT., Thwaites G., Anh NT., Nhan LNT., Van Tan L., SEACOVARIANTS1 None.
We report on a 2023 outbreak of severe hand, foot, and mouth disease in southern Vietnam caused by an emerging lineage of enterovirus A71 subgenogroup B5. Affected children were significantly older than those reported during previous outbreaks. The virus should be closely monitored to assess its potential for global dispersal.