Thanks for posting them up Kev.
Though I haven't fully read through all, I did notice words just as May, Could, most etc, so my personal interpretation is that despite the overall content of the articles, there was never a 100% guarantee that vaccines would 100% cover deaths, transmissions etc. only reduce the chance.
Add to that the natural mutations and of course vaccines may lose their effectiveness against new variants which then require new doses. It isn't unusual, the Flu vac gets tweaked every year, the only unusual point to me is the short gap for this one, but then as Noval virus, is that to be expected with very fast mutations. I dont know, only time will tell.