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. Emerging Frontiers Library for The American Journal of Social Science and Education Innovations, [S. l.], v. 8, n. 03, p. 195–205, 2026. Disponível em: https://emergingsociety.org/index.php/efltajssei/article/view/1259. Acesso em: 2 may. 2026.