“…Three of the studies (Antai D, 2010;Baba and Ayivor, 2012;Antai D, 2012) are retrospectives with secondary data (readymade), in which the first assessed the effect of individual and community level participation, the second evaluate the good, the bad and the ugly aspects of polio in Nigeria, and assessed the association between multiple dimensions of gender inequalities and full childhood immunization. The remaining fifteen articles (Alfred and Alfred, 2012;Nnenna et al, 2013;Iliayasu Z, et al, 2014;Itimi et al, 2012;Ogwumike et al, 2012;Ekure et al, 2013;Tagbo B N, et al, 2012;Oyefara J L, 2014;Awodele O. et al, 2010;Oladejo O P et al, 2013;Abdulraheemetet al, 2011;Singh et al, 2013;Rahji and Ndikom, 2013;Ita et al, 2012;Olawepo and Fashagba, 2014) were purely cross sectional descriptive studies.…”