All travelers from Pakistan will be required to produce a valid ______ certificate from June 1, 2014.A. Rubella virusB. Polio vaccinationC. Avian flu vaccineD. None of the above 0 0 votesArticle Rating Subscribe LoginNotify of new follow-up commentsnew replies to my comments Label {} [+] Name* Email* Website Label {} [+] Name* Email* Website 0 Comments Oldest Newest Most Voted Inline FeedbacksView all comments