What is it with me drawing her all contorted? I don't get it. Well maybe it's the character saying that it's one of their quirks.
The one thing that I had to realize is that I couldn't go easy on her design if I was going to make all the others of the infected population disgusting, horrific, revolting or just plain creepy. There's a lot more to her design than what I was able to draw here.
You could say that it's part of her design to keep a lot of quirks tucked away/not as obvious as other infectees. Most of which will come to light more towards the middle of the story. At one point she's given the choice to either agree to get a physical examination, blood, skin, hair and whatever other kind of sample that they can get from her or they can do it through autopsy if she refuses. Luckily the people hired to do this are actually considered the good guys. You don't want to know what the bad guys would do.
The hardest part is to keep just enough human features blended into the design to all just a little more creepy. More updates on her in the future.