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The seasonality of hMPV, influenza viruses, and RSV infections in Boston, MA, USA. Each curve shows the percentage of patients with the indicated virus during the indicated 4-week period.
From McAdam AJ, Hasenbein ME, Feldman HA, et al. Human metapneumovirus in children tested at a tertiary-care hospital. J Infec Dis 2004;190(1):21–6; with permission.
