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<blockquote data-quote="greybeard" data-source="post: 1652875" data-attributes="member: 18945"><p>Silver said:</p><p>"<em>If it's 95% effective as they say it is then 5% of the elderly and healthcare workers would still be at risk.</em>"</p><p></p><p>That's not exactly what 95% efficacy means. There is efficacy and effectiveness and they don't mean the same thing. A vaccine will only save a single life. Vaccine programs save millions of lives and if the program is ineffective because a large slice of the people won't get it, then the effectiveness is greatly lessened. The only reason smallpox and polio were eradicated to the degree they were was not because of the efficacy of the vaccine, but because of the effectiveness of those 2 vaccine programs coupled with the efficacy. </p><p></p><p>An estimated 86% of the world's population has been vaccinated for polio. </p><p>The smallpox vaccine program shot for and came close to 80% via mass vaccination and followed that with ring vaccination protocols to control outbreaks (mostly in India) until it was declared eradicated globally.</p></blockquote><p></p>
[QUOTE="greybeard, post: 1652875, member: 18945"] Silver said: "[i]If it's 95% effective as they say it is then 5% of the elderly and healthcare workers would still be at risk.[/i]" That's not exactly what 95% efficacy means. There is efficacy and effectiveness and they don't mean the same thing. A vaccine will only save a single life. Vaccine programs save millions of lives and if the program is ineffective because a large slice of the people won't get it, then the effectiveness is greatly lessened. The only reason smallpox and polio were eradicated to the degree they were was not because of the efficacy of the vaccine, but because of the effectiveness of those 2 vaccine programs coupled with the efficacy. An estimated 86% of the world's population has been vaccinated for polio. The smallpox vaccine program shot for and came close to 80% via mass vaccination and followed that with ring vaccination protocols to control outbreaks (mostly in India) until it was declared eradicated globally. [/QUOTE]
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