[weaksauce]

Even if it went to waste while being potent it would go to a secondary containment. If the human error was in the secondary containment then I can see it being released. I have worked as a contractor for various pharma companies and know how they operate. Not all of them are all that good at what they do and paying for brand names is better than the generics because of the levels of quality assurance.

It was likely some polio introduced into secondary and they didn't process it correctly in that area.