[logicalmonster]

> 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.