I'm pretty sure that no vaccine is 100% effective. Just as people's reaction to infection with a particular pathogen varies quite a bit, so people's immune systems don't all respond in the same way to vaccination.
What researchers are sure about is that all of the Covid vaccines drastically reduce the chance that contact with the virus will have serious consequences. If you've been vaccinated, your body may instantly attack and neutralise the virus before it can infect cells and reproduce, so you will have no symptoms at all. If your immune system doesn't respond that aggressively, you may feel shitty for a few days and recover. It's very unlikely (but not impossible) that a vaccinated person will end up requiring hospitalisation, and also unlikely that they will have lingering aftereffects.
Thoughts on covid vaccines?
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I'm pretty sure that no vaccine is 100% effective. Just as people's reaction to infection with a particular pathogen varies quite a bit, so people's immune systems don't all respond in the same way to vaccination.
What researchers are sure about is that all of the Covid vaccines drastically reduce the chance that contact with the virus will have serious consequences. If you've been vaccinated, your body may instantly attack and neutralise the virus before it can infect cells and reproduce, so you will have no symptoms at all. If your immune system doesn't respond that aggressively, you may feel shitty for a few days and recover. It's very unlikely (but not impossible) that a vaccinated person will end up requiring hospitalisation, and also unlikely that they will have lingering aftereffects.