I don't fully understand what you are talking about?!
But I can assure you that the average lifes expectancy got higher from our ancestors time till today. But of course some of them got very old as well.
But I also know smokers who got 100 years old - And I am still convinced smoking is unhealthy ;)
RE: A response to @chron: Why you should believe in Herd Immunity!
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A response to @chron: Why you should believe in Herd Immunity!