People make erroneous inferences all over the place....
The proper take is that efficacy is never 100%. Thus, one never should have thought they were "all clear" and other defenses suddenly became unnecessary and "normal" can fully be back. For the sake of collective altruism, protecting that one exception(The Black Lotus) matters and it is evident people would rather be socially satisfied than continuing to play defense. Plus, effectiveness is a different concept from efficacy.
That doesn't mean the vaccine is useless or didn't work either. The vaccine works as it should but wishful thinking and motivated reasoning made people desperate to believe it alone would have fairy dust powers that would keep the body pure.
5% of 20 million is 1 million.
People also have a problem with small number. Comparing tens, thousands, millions, and billions have a understandable change in scale. But talk about tenths, thousandths, millionths, and billionths, and peoples' brains start thinking "synonymous".
In science, vaccine efficacy and effectiveness mean something different.
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