The immune system is crucial for overall health from "summary" of Lifespan by David Sinclair,Matthew D. Laplante
The immune system is like an invisible shield that protects us from harm. It is our body's defense against invaders such as viruses, bacteria, and other pathogens that can make us sick. Without a properly functioning immune system, we would be vulnerable to all sorts of illnesses and infections. When our immune system is working well, it can identify and destroy harmful invaders before they have a chance to cause serious damage. It does this through a complex network of cells, tissues, and organs that work together to recognize and neutralize threats to our health. But our immune system is not infallible. As we age, it can become less effective at fighting off invaders, leaving us more susceptible to illness. This decline in immune function is a major contributor...
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