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Other Emerging Pathogens Toolbox

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Pneumonia

Human Metapneumovirus Seasonality and Co-Circulation with Respiratory Syncytial Virus — United States, 2014–2024 (NEW 4/20, Website, Regulation/Guidance)
CDC / MMWR
3 April 2025

Jobe NB, Rose E, Winn AK, Goldstein L, Schneider ZD, Silk BJ.
Circulation of both hMPV and RSV declined significantly during the 2020–21 respiratory virus season when the COVID-19 pandemic began.

Epidemiology of Symptomatic Human Metapneumovirus Infection in the CASCADIA Community-Based Cohort — Oregon and Washington, 2022–2024 (NEW 4/20, Website, Regulation/Guidance)
CDC / MMWR
3 April 2025

Shakya M, Chu HY, Englund JA, et al.
In this community cohort study including participants aged 6 months–49 years, average incidence of symptomatic hMPV infection was 7.5 per 100 persons per year. Incidence was highest during January–March and among children aged 2–4 years, and clustered in households. Although most infections caused mild illness, 27% were associated with absenteeism from work, school, or a child care facility.

RSV

respiratory syncytial virus

Human Metapneumovirus Seasonality and Co-Circulation with Respiratory Syncytial Virus — United States, 2014–2024 (NEW 4/20, Website, Regulation/Guidance)
CDC / MMWR
3 April 2025

Jobe NB, Rose E, Winn AK, Goldstein L, Schneider ZD, Silk BJ.
Circulation of both hMPV and RSV declined significantly during the 2020–21 respiratory virus season when the COVID-19 pandemic began.

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