I'm trying to find out the title of a book or short story which I can very dimly remember, no idea on date of publication or even the main plotline! If anyone can identify it from what I can remember, it will be a miracle.
One of the characters was an un-altered female(?) child(?) who was shunned because she was ugly, which basically meant that she hadn't been designed to be perfect like all the others. At some point, a whole batch of children who had been altered to have a particular trait suddenly started dying as the trait had a deadly side effect.
I don't even think that this was the main plot, it may have been a side plot or part of the initial scene setting at the start.