Is preventive medicine its own health risk?

Misunderstanding risk factors has led to massive overtreatment of diseases people don’t have and probably never will. Most health-conscious people are familiar with the concept of risk factors for disease. We’re too familiar, in fact. A risk factor is like the guest that nobody invited to the party, a spoiler. Though we might feel fine now, our individual risk for (fill in the blank) tells us that our wellbeing might not last. That vague and remote prospect of a stroke...

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