It may sound unbelievable but the deadly Human Immunodeficiency virus which causes AIDS, can, after suitable modification, play a beneficial role in treatment of blindness and other generic
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/aids-virus-can-treat-blindness
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/statesman-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health