Earlier quoted context omitted.
Something similar to the Rubella vaccine that took about four years to be licensed. https://en.m.wikipedia.org/wiki/Rubella_vaccine
My problem with this "we just have to wait N units of time" approach is: what do we do instead meanwhile? What's the alternative?
And at the same time not forcing everyone to take the vaccine.
As an example Denmark will reach about 75% vaccinated without any mandates, though a Corona passport will be in effect until October 2021.
That is one of the better ways of handling it in my opinion.