John Brosnan 's novel The Fungus from 1985 has a similar plot , in which mutated fungi destroy England .
Those infected die or become mutated mushroom people , depending on which type of fungus has infected them .
John Brosnan 's novel The Fungus from 1985 has a similar plot , in which mutated fungi destroy England , and those infected die or become mutated mushroom people , depending on which type of fungus has infected them .