Ed Morrissey fights Bachmann's misinformation:

The FDA has received no reports of brain damage as a result of HPV vaccines Gardasil and Cervarix.  Among the reports that correlate seriously adverse reactions to either, the FDA lists blood clots, Guillain-Barre Syndrome, and 68 deaths during the entire run of the drugs.  The FDA found no causal connection to any of these serious adverse events and found plenty of contributing factors to all — and all of the events are exceedingly rare. The “mental retardation” argument is a rehash of the thoroughly discredited notion that vaccines containing thimerasol caused a rapid increase in diagnosed autism cases.

Weigel:

The fact that it's Bachmann embracing this — Bachmann, who has a habit of endorsing or "just asking questions" about dark theories that she's overheard — is totally unsurprising.