dead organisms are a source of disease
corpse is dead_organism. dead_insect is dead_organism. dead_living_organism is not dead_organism. dead_tree is dead_organism. dead_human_body is dead_organism. dead_organism is not former_living_thing. dead_organism is former_living_thing. dead_living_organism is dead_organism. dead_person is dead_organism. dead_vertebrate is dead_organism.