Reaching Pandemic Milestones with Country Primary and Secondary Vaccination Inflection Points: An Assessment of Foundational and Hybrid Fore. London Journal of Engineering Research, [S. l.], v. 24, n. 3, p. 1–29, 2024. Disponível em: https://journalspress.uk/index.php/LJER/article/view/880. Acesso em: 2 feb. 2026.