To be fair, you can find an issue with all sorts of medicine in the past. That doesn't mean we stop taking medicine. Do we also stop using software because some

To be fair, you can find an issue with all sorts of medicine in the past. That doesn't mean we stop taking medicine. Do we also stop using software because some app had a bug? Of course not. So no, I don't think defending anti-vaxxers with that example is being "fair". I realize you're not really defending their overall position, but even the line of thinking you proposed is deeply flawed.