>Because vaccinated people can still spread infections vaccinations, just like lockdowns, do not help ‘getting things under control’. They only delay progression of the pandemic.
Delaying the progression DOES help get things under control.
>The only argument there is is that vaccinated people get less seriously ill
No it's not. Vaccinated people are less likely to get ill at all, get seriously ill, or spread the virus.
Vaccinated people are just as likely to spread the delta variant. If you disagree, please post your proof. Until then, please stop spreading misinformation.
Weird, I've yet to get chicken pox/shingles, mumps, polio etc despite being vaccinated against them as a child. And I still catch the flu regularly despite having already had it.
We obviously do not know yet whether we can get permanently robust immune response to SARS-CoV-2, either from vaccines or from natural infection; the virus is only two years old. We know that we can get permanently robust immune response to the viruses you mentioned in your post. But this cannot be easily generalized to any new virus that comes along.
That’s why the new push is for ‘booster shots’.
The original strain upon which the current vaccines are based has basically died out and Delta carries a lot more viral load (400x or so?), which changes the game a bit.
In comparison, smallpox virus was pretty much the same across centuries, so it was comparably easy to target and eradicate. No animal hosts helped, too.
Pfizer themselves have performed studies that show immunity declining. I do know that they tell from the levels of antibodies seen in blood but I don’t know if the effect of variants has been measured (if it can be measured at all without unethical experiments).
Because vaccinated people can still spread infections vaccinations, just like lockdowns, do not help ‘getting things under control’. They only delay progression of the pandemic.
You say ‘it will probably be a common cold, once humans have enough antibodies’. Humans do not get permanent antibodies from the vaccines. They get antibodies from getting infected. Lockdowns and vaccines only delay the inevitable.
The only argument there is is that vaccinated people get less seriously ill than unvaccinated people. But then it affects only themselves so it’s pretty hard to argue for schemes that force people to get vaccinated against their will.