The first dose of polio vaccine is administrated at the age of:A. 2 monthsB. 6 monthsC. 6-18 monthsD. 4-6 years 0 0 votesArticle Rating Subscribe LoginNotify of new follow-up commentsnew replies to my comments Label {} [+] Name* Email* Label {} [+] Name* Email* 0 Comments Oldest Newest Most Voted Inline FeedbacksView all comments
