The sudden fall in temperature and unexpected rains are conducive to the spread of the swine flu virus, officials said.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/swine-flu-season-back-claims-3-lives
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-lucknow
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/uttar-pradesh
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/lucknow-d
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/swine-flu
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/infectious-diseases
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/influenza
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health