Thanks, but don't get me wrong - I'd like to see everyone vaccinated, but realistically if 30% are infected/immune by early Feb and we can vaccinate 60% of those eligible over 16 (including almost all of the most vulnerable and health care workers) by the end of April, assuming half of those infected also get vaccines (50% overlap, which is 15% of the population roughly), that's 75% of the adult population who are then almost all immune, which is essentially herd immunity (estimates on that have been 55-80%).
And transmissions don't just start going down when we reach herd immunity - they should start dropping off swiftly by the time we vaccinate maybe 20-30% of the adult population, which should be by early February. I think we'll start to see relaxations in restrictions when transmission levels go way down and not before then, but I think some are thinking they have to be zero for that and I disagree - but I'm not in charge. However, even if transmissions drop quickly by early February, I could see being conservative and not relaxing restrictions much until maybe the end of March or April, just to be sure - but not waiting until September.