.I’m wondering when were those who received a first vaccine were considered to be vaccinated ? Were it the moment yer took the vaccine, or were it two weeks later ?
That was made quire clear at the time to anyone who paid any attention - the vaccine triggers a response from your immune system that can take a couple of weeks to reach full effect. Really not rocket science.
That gov.uk website shows what extensive care has been taken in reporting adverse side effects of the vaccines - as mentioned earlier, for most people it is no more than a sore arm.