Pre-disposing factors for infections in elderly

Infections in the elderly are a significant clinical concern due to various predisposing factors that make this population more vulnerable. Aging is associated with physiological changes, immunosenescence, and comorbidities, which collectively impair the body's ability to resist and fight infections effectively.

1. Immunosenescence:  
The aging immune system undergoes structural and functional decline, leading to reduced immune responses. This includes a decrease in T-cell proliferation, reduced production of naïve T-cells from the thymus, and impaired antigen recognition. B-cell function also diminishes, resulting in lower antibody production. The overall reduction in both innate and adaptive immunity weakens the body’s defense mechanisms against pathogens.

2. Chronic comorbidities:  
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