The "girl doll dressed" virus wasn't responsible for distorted babies. It was responsible for the complete destruction of people's games (for me, it was severe lag that would eventually cause a crash to desktop) that would often force them to uninstall it and reinstall it. So if all you got was distorted babies out of it, consider yourself very lucky, because it caused catastrophic problems for most everyone else. I got that evil doll from a house I downloaded from the Sims Exchange, and it took 3 complete uninstalls and reinstalls to finally get my game to work again. What made it so bad was that it attached itself to every sims3package file it came into contact with, whether you used it or not.
Plus, it was close to a year ago that this file was making it's rounds. Most every site (including the site it originally came from, which I won't mention for more reasons than I have space to list) has purged that doll and anything it has corrupted, so one would have to download something from a site that was rather out of date to get it.
Distorted babies are caused by poorly made 3rd party custom content.