Animals and humans suffering from immunosuppression can also have in some ways a hyperactive immune system. This is because the human body can produce antibodies directed against itself
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/autoimmunity
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/down-earth
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/pesticides
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects