Municipalities moving piggeries out of human habitation.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/rise-encephalitis-cases-govt-conduct-entomological-survey
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/west-bengal
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/encephalitis
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/siliguri
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/jalpaiguri-d