Fig. 2
PRIMSA diagrams for three prongs of the scoping review*. *We extracted a total of 3049 articles across all three prongs of the review. We excluded articles not primary focused on polio, those focused on 鈥渦pstream鈥� such as disease physiology and vaccine development. The main reasons for not being able to extract articles are: lack of access to full text materials for some records and language limitations with included non-English articles, e.g. Spanish and Portuguese materials