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Frailty is the inability of the body to cope with everyday or acute stressors. The World Health Organization (WHO) defines it as progressive age-related decline in physiological systems that results in decreased reserves of intrinsic capacity. The individual becomes more sensitive to stressors, increasing the likelihood of a general decline in their health (WHO, 2015). Frailty increases the vulnerability of an individual, and the likelihood of hospitalization and death.
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Koutsostathis et al. (2024) studied this question.