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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...
Obesity is a risk factor for complicated influenza A/H1N1 disease and poor vaccine immunogenicity. Leptin, an adipocyte-derived hormone/cytokine, has many immune regulatory functions and therefore could explain susceptibility to infections and poor vaccine outcomes. We recruited 159 healthy adults (50–74 years old) who were immunized with inactivated TIV influenza vaccine that contained A/California/7/2009/H1N1...
Immunosenescence refers to the inability of an aging immune system to produce an appropriate and effective response to challenge. This immune dysfunction may manifest as increased susceptibility to infection, cancer, autoimmune disease, and vaccine failure. Mounting biological evidence supports the potential clinical relevance and impact of immunosenenscence. We briefly review immunosenescence with...
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