> I would think that, with the number of people who received it, any issues would have been sussed out by now
A large sample size means less if the problems are longer-term in nature such as an increase in cancer rates down the road or problems with fertility, which might take more time to fully detect and understand.
And a large sample size means little without a control group: yet if some people had their way, there'd be no control group left.
If you on principle refuse to take any medication or vaccine due to the fact that they almost all have rare, unstudied or potential side effects then that's totally fair. The human body is a very complex thing and every single one of us is different so it's basically impossible to truly know if a drug will have no rare side effects for some sub group. Or at least do extensive deep research on every single medication you take including supplements and over the counter things.
If you only do this for the covid vaccine due to reading too much fearmongering then that just means you're irrational.
That doesn't account for long term side effects, that may only be seen years, or decades, later.
Of course, catching covid may also have unknown long term side effects, like how some who caught Spanish flu went on to develop encephalitis lethargica.
Vaccinated or not you're part of what is effectively the largest post marketing clinical study, either as the treatment or control group. Science is fun like that.
A large sample size means less if the problems are longer-term in nature such as an increase in cancer rates down the road or problems with fertility, which might take more time to fully detect and understand.
And a large sample size means little without a control group: yet if some people had their way, there'd be no control group left.