a minor injury in a younger person can become a life-changing event for someone over 80.
Weakened Immune Response
The immune system also ages.
This phenomenon, known as immunosenescence, makes it harder for older adults to:
Fight infections
Recover from illnesses
Respond effectively to vaccines
Even common infections such as influenza or pneumonia can become serious threats.
2. Chronic Diseases Accumulate Over Time
The second major reason many people do not live far beyond 80 is the accumulation of chronic health conditions.
Unlike acute illnesses that appear suddenly and resolve
