Monsoon and dengue transmission have a strong link.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/dengue-numbers-sting-tale
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/dengue
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vector-borne-diseases
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/kerala
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/haryana
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rajasthan
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health