Meerut is worst affected with around 200 cases reported so far, followed by Lucknow with 173 cases and Ghaziabad with 128 cases.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/swine-flu-cases-rise-780-cases-reported-year
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/indian-express-lucknow
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/uttar-pradesh
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/swine-flu
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/meerut-d
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/lucknow
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ghaziabad-d
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rae-bareli-d
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/saharanpur
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/kushinagar