(It also means that some of the infected he's been executing were people that he has been murdering people.)

That realization means that a fully infected person can be a person can laugh, care, and be fully human. And what he sees simply confirms what he saw before she hit him - she's fully infected. He doesn't prepare a new slide, he's still just looking at Ruth's blood. Slowly he slid off the stool and placed the microscope back on its base.

Neville then simply picks up the microscope: We've found a way to do that and we're going to set up society again slowly but surely. What you don't understand yet is that we're going to stay alive. They have stopped preying on one another, and the living infected are wiping out the undead infected in fact the living infected are forming a new society. The letter tells him that the infected have learned to live without always needing fresh blood. (Up to this point Neville has killed every infected person he's found.) When he wakes up, Ruth is gone and he finds her letter. 'Robert, don't look!' she begged suddenly, her voice pleading.Īt which point she attacks him, since she's afraid of what he will do to her. She slid off the stool as he bent over the microscope. 'Yes, but-' He broke off as he slid the glass slide onto the microscope. Neville made a slide of Ruth's blood and discovered that she was infected: You need to consider this in the context of what has just gone before. (Note also that Neville is changing too, with the knowledge he has just received.) The point is both that the original disease that killed so many and made the rest 'vampires' is changing, and so are the infected people changing, as the bacteria and its hosts (humans) adapt to one another. The operative part of the quote is 'Bacteria can mutate,' which is shorthand for the idea that living things can change.

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