Transmission dynamics of dengue–Zika co-infection with antibody-dependent enhancement, cross-immunity, and vaccination: backward bifurcation analysis and data calibration. Journal of the Nigerian Society of Physical Sciences, [S. l.], v. 8, n. 3, p. 3405, 2026. DOI: 10.46481/jnsps.2026.3405. Disponível em: https://journal.nsps.org.ng/index.php/jnsps/article/view/3405. Acesso em: 31 jul. 2026.