Why a 95% effective vaccine doesn't mean a 5% failure rate
In short: Vaccine efficacy is often misunderstood as a simple probability of infection. This video clarifies the actual mathematical framework used to calculate these percentages and explains why comparing different vaccines by these numbers can be misleading.
The video explains that a 95% efficacy rating is not a direct measure of an individual's chance of getting sick. Instead, it refers to a specific statistical calculation used during clinical trials to measure how well a vaccine performs in a controlled environment.
Because the math behind these figures differs from simple probability, the video argues that comparing efficacy rates between different vaccines is often inaccurate. Understanding this distinction is essential for interpreting public health data correctly.
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- Summary by Intellect · source: What Does a 95% Effective Vaccine Really Mean?
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