"We're talking about if they were ever claimed to be 100% effective....if you overpromise at the beginning, you lose your credibility, and then you get cheap shots."
The articles I linked used the two words interchangably. Clearly that distinction isn't relevant to the layperson audience. You're just playing with words.
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Ok, let me quote exactly what I just said:
"We're talking about if they were ever claimed to be 100% effective....if you overpromise at the beginning, you lose your credibility, and then you get cheap shots."
EFFICACY is a different word than effective.
https://www.cbsnews.com/newyork/news/sanofi-gsk-covid-vaccin...
“New vaccine demonstrates 100% efficacy against severe COVID, hospitalizations”
The articles I linked used the two words interchangably. Clearly that distinction isn't relevant to the layperson audience. You're just playing with words.