Fig. 2From: A systematic review of influenza A virus prevalence and transmission dynamics in backyard swine populations globallyPRISMA chart illustrating the search strategy for identifying the relevant full-text research articles available in NCBI-PubMed and Google Scholar databases up to 11 July 2021 for inclusion in the study. Full-text original research articles which investigated molecular and/or serological prevalence of IAV exclusively in backyard swine populations were included in systematic reviewBack to article page