I just finished "Virus" by Sarah Langan. Wish I hadn't started it, and was compelled to get to the end out of sheer curiosity.
Why did I pick it up in the first place? Because I thought it might be a bit like that movie "Breakout" with Dustin Hoffman.
I should be so lucky.
It (Virus) started off rather 'normal' so that by the time I'd got hooked, it was too late for me to go back, much like the ruddy 'Virus' I guess.
Better luck next time..