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To define the role of human metapneumovirus (hMPV) in previously healthy Korean children, a retrospective study was done on 166 children with lower respiratory tract infections and on their stored nasal aspirates. The hMPV gene was detected by reverse transcriptase-polymerase chain reaction. Twenty-six of 166 individuals tested positive for hMPV. The clinical diagnoses of hMPV infection were pneumonia in 15 children and bronchiolitis in 11 children.
Kim et al. (2005) studied this question.