Refusal or hesitation to get vaccination against deadly diseases despite availability of vaccines is seen as one of the top threats to public health, according to World Health Organisation (WHO).
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/vaccine-refusal-among-top-10-threats-public-health-who
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vaccination
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/who
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/diseases
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/immunisation
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health