early claims of vaccines preventing infection or even spread weren't supported by the trials.
Who made such stupid claims and __why__? My own recollection, from Australia watching the US, was the the US political administration of the time turned any scientific based discussion into a complete shit show - many images of cowered CDC employees sucking their faces in while Trump v1.0 babbled on about bleach and sunlight.
From my first free of politics encounters with world class epidemiologists in 1980 or so I've not heard one claim that any vaccine had a 100% efficacy rate for both disease prevention and for eliminating spread - it has _always_ been a numbers game, like seat belts, of statistical reduction.
Your own link agrees:
Conclusions: A two-dose regimen of BNT162b2 conferred 95% protection against Covid-19 in persons 16 years of age or older.
95% protection is pretty good, but for all manner of reasons it's unusual to expect any vaccine to prevent 100% of all infections across millions of people or animals.
Typically, in educated countries, phrases such as "prevent infection and spread*" are understood to mean that in the same manner as "seat belts prevent death and injury*"
alt Hacker News
The issue specifically is:
Who made such stupid claims and __why__? My own recollection, from Australia watching the US, was the the US political administration of the time turned any scientific based discussion into a complete shit show - many images of cowered CDC employees sucking their faces in while Trump v1.0 babbled on about bleach and sunlight.From my first free of politics encounters with world class epidemiologists in 1980 or so I've not heard one claim that any vaccine had a 100% efficacy rate for both disease prevention and for eliminating spread - it has _always_ been a numbers game, like seat belts, of statistical reduction.
Your own link agrees:
95% protection is pretty good, but for all manner of reasons it's unusual to expect any vaccine to prevent 100% of all infections across millions of people or animals.Typically, in educated countries, phrases such as "prevent infection and spread*" are understood to mean that in the same manner as "seat belts prevent death and injury*"
( * exceptions expected )