Polio transmission may be at its lowest-ever levels globally, but a top WHO official warns that the risk of importation of the virus into all polio-free areas still persists.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/risk-importation-polio-virus-still-persists-who-official
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/polio
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/who
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/diseases
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vaccination
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/immunisation
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health