Health experts have claimed that reverse osmosis water purifiers do not provide 100 per cent virus-free water and can lead to Hepatitis A and E.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/ro-water-not-100-cent-safe-claim-health-experts
[2] http://admin.indiaenvironmentportal.org.in/category/author/shashi-bhushan
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/asian-age-new-delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/hepatitis
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-quality