The answer to your question is VERY complicated. The exact answer to the first two depend on precisely when you’re talking about. For much of 2021, the vaccine did indeed prevent people from getting and passing on COVID. Later in 2021, not so much. The data for the updated vaccine in late 2022 is not available yet, so that’s just a maybe.
The last question is easy. The vaccine prevents people from getting severely ill and dying from COVID. No doubt.
After all lies exposed, you still believe in that?