The other thing you allude to is the timing. I'm in Canada too, and got my shots 8 weeks apart which was the earliest possible due to availability. For people that got their first shot early, I think the delay is even longer. And now I believe it's back to the manufacturer recommendations.

I understood there are studies that say a longer delay may be better, so I'd be curious too how the result here translates to people who had a much longer time between shots. Was the UK also in this situation?