So what
You are falsely trying to claim that because the advice changed that proves something negative.
An intelligent person would realise the advice changed because
A) it was a novel virus and advice changed as knowledge was gained from the data as it was created
B) the virus mutates so the data had to be continuously monitored
Anecdotal evidence is driven by cognitive bias
If claims of a vaccine's efficacy do not come to be then those claims are simply false. It is not 'advice changing' as you've tried to spin it into, Alistair Campbell. Even someone with basic knowledge knows the virus continually mutates so why would those producing the jabs make those declarations in the first place?
As I said, I originally took this seriously. I changed my view upon the evidence. There was no bias.
Yet when the media rushed to an obese patient in a hospital telling the world they regretted not taking the vaccine, there was no cognitive bias there, right?