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de9ebkmd7 5 points ago +5 / -0

Yeah that was my thought, words often have multiple or precise technical meanings in scientific and engineering contexts.

4
Skogin 4 points ago +4 / -0

I don’t buy it.

1
zooty 1 point ago +1 / -0

Yes. And in this case that's not the correct one.

https://www.immune.org.nz/vaccines/efficiency-effectiveness#:~:text=Vaccine%20efficacy%20and%20effectiveness%20are,use%20in%20the%20general%20population.

I don't believe he intended to use that word and the 60-70% is surely related to how effective the vaccine will be in use but it's very interesting that that word did slip in there.