Vaccines are designed to reduce likelihood of contracting disease and/or reduce the effects of disease if contracted. The COVID vaccines did both of these things

Vaccines are never perfect barriers. It's better to think in terms of population scales. if enough people are vaccinated against a disease, then most of the people who would have contracted it will not. And that means a large reduction in the amount of that disease floating around, and that effect compounds.

For you to claim otherwise is either naïveté or trolling

> Vaccines are designed to reduce likelihood of contracting disease and/or reduce the effects of disease if contracted.

You previously stated "(Vaccines being supposed to prevent Covid) was never the case." It sounds like you are claiming that vaccines prevented transmission of Covid at acceptable rates but you've provided no supporting arguments.

> Vaccines are never perfect barriers.

This is a straw man. Nobody in the conversation claimed vaccines were supposed to prevent Covid 100% of the time, just they were originally claimed to prevent people from contracting Covid and generally did not do so. I am sure you already aware of this and are projecting regarding your accusations of trolling.

To be clear, your claim is that COVID vaccines did not reduce likelihood of infection? It's not clear exactly what point you're trying to make here. Were they completely ineffective? Not effective enough for your tastes? If the latter, what degree of likelihood reduction is your bar?

It's not hard to find literature demonstrating a reduction in infection rate [1]

[1] https://www.nejm.org/doi/full/10.1056/NEJMoa2034577

The reality is that the process is meant to look like this:

1. Give the vaccine to everyone. 2. The disease goes away.

There's nothing deeper - they're not "meant" to make any individual stop having symptoms or stop spreading or whatever. They were just "meant" to make the disease go away, and before COVID, we'd never really looked at it in more detail than that.