Final answer:
The term that describes the intersection of improved health and longevity is healthspan. Healthspan refers to the period of a person's life during which they are generally healthy and free from chronic diseases or disabilities.
Step-by-step explanation:
The term that describes the intersection of improved health and longevity is healthspan. Healthspan refers to the period of a person's life during which they are generally healthy and free from chronic diseases or disabilities. It represents the ability to maintain physical and mental well-being as one ages, allowing individuals to live longer, more fulfilling lives.
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