Nnadi, Emmanuel Ebuka, et al. “The Ethics of Vaccination Against Infectious Diseases: The Two Sides of the Coin”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 54, no. 2, Oct. 2020, pp. 230-7, https://gssrr.org/JournalOfBasicAndApplied/article/view/11751.