Japan confirmed its fourth case of the A(H1N1) flu virus on Sunday in a teenager who returned from a school trip to Canada with the three other Japanese who contracted the ailment, commonly known as swine flu.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/4-th-swine-flu-case-certified-japan
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/international-herald-tribune-bangkok
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/viral-diseases
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/influenza
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/who
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/japan