MARCELLINA OKIM; GLORIA CHIGBU; OSAZUWA M. CHRISTOPHER; MARYJANE Y. OGHOGHO. Evaluating the Effectiveness of The National Health Insurance Scheme (NHIS) As A Mechanism for Social Security in Nigeria: Achievements, Challenges, And Policy Gaps. The American Journal of Social Science and Education Innovations, [S. l.], v. 8, n. 03, p. 195–205, 2026. DOI: 10.37547/tajssei/Volume08Issue03-18. Disponível em: https://www.theamericanjournals.com/index.php/tajssei/article/view/7704. Acesso em: 19 apr. 2026.