Answer the question about text:

Claire stays with him in his dreams , kisses him , whispers to him on cold nights , and his body responds even when his mind does n't want to . He hates her , hates himself , hates the world . The virus moves faster every year , felling families , politicians , schoolteachers , doctors ; the high and the low - and Peter has n't done a thing to stop it . Has n't done a thing , and does n't care to .

Why is Claire only with him in his dreams ?
Because she died .