Yeah XD It sucks. 

So, I have a question that is sort of iffy. What if, somehow, Cassie was half alien? I know I put her mother had died when she was a baby, so what if her mother was an alien that had come to earth with her kind to help pick out those humans who would be infected first? And during her time there, she had had fallen in love with a human and had a child with him unknown to her own people until it was too late? It would also give reason for them to want to have killed she and her father, but when they went to do so, they only found her father, her being in the secret room of the house hiding? And woul also give a reason why she would be immune, as aren't the aliens immune to the virus? IDK, just an idea XD