Journal
INFLUENZA AND OTHER RESPIRATORY VIRUSES
Volume 12, Issue 1, Pages 132-137Publisher
WILEY
DOI: 10.1111/irv.12486
Keywords
burden; influenza; United States
Categories
Funding
- World Health Organization (WHO)
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BackgroundEstimates of influenza disease burden are broadly useful for public health, helping national and local authorities monitor epidemiologic trends, plan and allocate resources, and promote influenza vaccination. Historically, estimates of the burden of seasonal influenza in the United States, focused mainly on influenza-related mortality and hospitalization, were generated every few years. Since the 2010-2011 influenza season, annual US influenza burden estimates have been generated and expanded to include estimates of influenza-related outpatient medical visits and symptomatic illness in the community. MethodsWe used routinely collected surveillance data, outbreak field investigations, and proportions of people seeking health care from survey results to estimate the number of illnesses, medical visits, hospitalizations, and deaths due to influenza during six influenza seasons (2010-2011 through 2015-2016). ResultsWe estimate that the number of influenza-related illnesses that have occurred during influenza season has ranged from 9.2million to 35.6million, including 140000 to 710000 influenza-related hospitalizations. DiscussionThese annual efforts have strengthened public health communications products and supported timely assessment of the impact of vaccination through estimates of illness and hospitalizations averted. Additionally, annual estimates of influenza burden have highlighted areas where disease surveillance needs improvement to better support public health decision making for seasonal influenza epidemics as well as future pandemics.
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