Cited by 530Immune responses and vaccinationsT-cell and B-cell ImmunologyImmunotherapy and Immune Responses

Immunosenescence and human vaccine immune responses

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Crooke, Stephen N., Ovsyannikova, Inna G., Poland, Gregory A., Kennedy, Richard B.·2019·Immunity & Ageing

Abstract

The age-related dysregulation and decline of the immune system—collectively termed “immunosenescence”—has been generally associated with an increased susceptibility to infectious pathogens and poor vaccine responses in older adults. While numerous studies have reported on the clinical outcomes of infected or vaccinated individuals, our understanding of the mechanisms governing the onset of immunosenescence and its effects on adaptive immunity remains incomplete. Age-dependent differences in T and B lymphocyte populations and functions have been well-defined, yet studies that demonstrate direct associations between immune cell function and clinical outcomes in older individuals are lacking. Despite these knowledge gaps, research has progressed in the development of vaccine and adjuvant formulations tailored for older adults in order to boost protective immunity and overcome immunosenescence. In this review, we will discuss the development of vaccines for older adults in light of our current understanding—or lack thereof—of the aging immune system. We highlight the functional changes that are known to occur in the adaptive immune system with age, followed by a discussion of current, clinically relevant pathogens that disproportionately affect older adults and are the central focus of vaccine research efforts for the aging population. We conclude with an outlook on personalized vaccine development for older adults and areas in need of further study in order to improve our fundamental understanding of adaptive immunosenescence.

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  • Vaccine responses are often lower in elderly adults, especially for hepatitis B, pneumococcal, and influenza vaccinations, and this reduced success is attributed to adaptive immunosenescence.

    “Although vaccination is key to prevent infections, vaccine responses are often found to be lower in elderly adults.In numerous studies, the markedly reduced vaccine success in older adults has been attributed to adaptive immunosenescence.Reduced vaccination success in elderly adults is especially known for hepatitis B, pneumococcal, and influenza vaccinations [22,23].”
  • 70-90% of influenza-related mortalities occur in people older than 65 years.

    “70–90% of influenza-related mortalities occur in people older than 65 years232”
  • The decline in immune function with age (immunosenescence) has been well documented.

    “The decline in immune function with age (known as immunosenescence) has been well documented79”

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Authors
Crooke, S. N., Ovsyannikova, I. G., Poland, G. A., & Kennedy, R. B.
Affiliations
Mayo Clinic (US)
Corresponding author
Kennedy, Richard B.
Venue
Immunity & Ageing
Published
2019-09-13
Volume
16
Issue
1
Pages
25-25
ISSN
1742-4933 (ISSN-L)
OpenAlex
W2972334025
Cited by
530
References
207
Citations by year
2026: 59 · 2025: 57 · 2024: 80 · 2023: 86 · 2022: 94 · 2021: 97 · 2020: 52 · 2019: 3 · 2018: 1
FWCI
5.27
Type
journal article
Language
en
Open access
Locations
  • Immunity & Ageing (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
National Institute of Allergy and Infectious Diseases (AI089859, AI132348)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Immune responses and vaccinations
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
  • Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
Keywords
immunosenescence, vaccine response, older adults, adaptive immunity, T cells, B cells, age-related immune decline, vaccine adjuvants, personalized vaccines

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