The experts have attributed the rise of swine flu cases to a change in the virus’ strain.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/488-swine-flu-deaths-reported-maharashtra-between-january-and-august
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/asian-age-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/maharashtra
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/swine-flu
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/influenza
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/infectious-diseases
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health