Well if the person who told Bachmann that story is real, there shouldn’t be any problem in finding and interviewing her. After all, according to Bachmann the woman approached her after the debate and told her about the damage the vaccine had caused her daughter. So the woman was evidently ready and willing to tell her story.
That's the question right there. Did this woman even exist. I have no idea.
Bachmann has been caught in little untruths before. When she said that her and her husband didn't benefit from the farms subsidies from the family farm when they did. (not a lot of money) And her excuse about why she was "late" to the meet and greet in Iowa that Perry attended. She said she was at a "family function" when her own mother admitted that she wasn't.