A team of Indian doctors is on the verge of a breakthrough in finding an oral cholera vaccine with long-term immunity, WHO officials said in Calcutta. The WHO officials were talking to reporters on
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/oral-cholera-vaccine-almost-ready
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/central-chronicle-bhopal
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health