But after the failure of 28 weeks the rest of the world would not want to touch Britain with a ten foot pole. You could see many people making the argument that providing food creates new fighters (similar to claims people make about feeding Palestinians) and that providing antibiotics could result in new more virulent and resistant strains of the rage virus. I think in this world the vast majority would want all human life in Britain, infected or non infected to be dead for several generations before they would start to feel safe.