I'm not sure I understand, so help me out here. You seem to be saying that getting a vaccination doesn't lower the likelihood of getting the virus or of spreading the virus.

I thought the whole purpose behind vaccinations was that it decreases the chance of the vaccinated person catching a virus.

And I thought the whole purpose of people not contracting the virus was that then they can't spread it.

So - if the vaccine doesn't do either of those things, what does it do?