Global genetic diversity of human metapneumovirus fusion gene
Emerging Infectious Diseases, Volume 10, No. 6, Year 2004
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We analyzed 64 human metapneumovirus strains from eight countries. Phylogenetic analysis identified two groups (A and B, amino acid identity 93%-96%) and four subgroups. Although group A strains predominated, accounting for 69% of all strains, as many B as A strains were found in persons ≥3 years of age.