Delivery of healthcare services to the rural population through mobile phones could could be the cheapest medium to penetrate the bottom of the pyramid and Public Private Partnership could be the best way to make this happen.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/mobile-usher-healthcare-revolution-rural-india
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/financial-express-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-care
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rural-health
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/india