DEN-2, a virulent strain of dengue, has raised its ugly head in Mumbai and the virus can even prove lethal if it combines with any of the three other types.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/virulent-dengue-strain-strikes-city
[2] http://admin.indiaenvironmentportal.org.in/category/author/sumitra-debroy
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-mumbai
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/maharashtra
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mumbai
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/dengue
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vector-borne-diseases
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/infectious-diseases
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health