Osadolor, O.O. , Osadolor, O.O. , Osadolor, A.J. and Ekpeti, A.P. 2023. Effectiveness of Vaccines and Barriers Against Effective Cold Chain Systems. Mediscope. 10, 1 (Apr. 2023), 38–41. DOI:https://doi.org/10.3329/mediscope.v10i1.65411.