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Cited by 457

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Impact of Obesity on Influenza A Virus Pathogenesis, Immune Response, and Evolution

Open access
Honce, Rebekah, Schultz-Cherry, Stacey·2019·Frontiers in Immunology

Abstract

With the rising prevalence of obesity has come an increasing awareness of its impact on communicable disease. As a consequence of the 2009 H1N1 influenza A virus pandemic, obesity was identified for the first time as a risk factor for increased disease severity and mortality in infected individuals. Over-nutrition that results in obesity causes a chronic state of meta-inflammation with systemic implications for immunity. Obese hosts exhibit delayed and blunted antiviral responses to influenza virus infection, and they experience poor recovery from the disease. Furthermore, the efficacy of antivirals and vaccines is reduced in this population and obesity may also play a role in altering the viral life cycle, thus complementing the already weakened immune response and leading to severe pathogenesis. Case studies and basic research in human cohorts and animal models have highlighted the prolonged viral shed in the obese host, as well as a microenvironment that permits the emergence of virulent minor variants. This review focuses on influenza A virus pathogenesis in the obese host, and on the impact of obesity on the antiviral response, viral shed, and viral evolution. We comprehensively analyze the recent literature on how and why viral pathogenesis is altered in the obese host along with the impact of the altered host and pathogenic state on viral evolutionary dynamics in multiple models. Finally, we summarized the effectiveness of current vaccines and antivirals in this populations and the questions that remain to be answered. If current trends continue, nearly 50% of the worldwide population is projected to be obese by 2050. This population will have a growing impact on both non-communicable and communicable diseases and may affect global evolutionary trends of influenza virus.

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Metadata

Authors
Honce, R., & Schultz-Cherry, S.
Venue
Frontiers in Immunology
Published
2019-05-10
Volume
10
Pages
1071-1071
ISSN
1664-3224 (ISSN-L)
OpenAlex
W2944462720
Cited by
457
References
12
FWCI
47.20
Type
journal article
Language
en
Open access
gold

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CoChat. (2026). Citation check: Impact of Obesity on Influenza A Virus Pathogenesis, Immune Response, and Evolution. https://app.cochat.ai/papers/10.3389/fimmu.2019.01071
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Honce, R., & Schultz-Cherry, S. (2019). Impact of Obesity on Influenza A Virus Pathogenesis, Immune Response, and Evolution. Frontiers in Immunology. https://doi.org/10.3389/fimmu.2019.01071

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