For years it has remained their sole means of negotiation.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/uttar-pradesh-village-boycotts-immunisation
[2] http://admin.indiaenvironmentportal.org.in/category/author/teena-thacker
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/uttar-pradesh
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/badaun-d
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/immunisation
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/child-health
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vaccination
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/polio
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health