GUTIÉRREZ, M. C.; OLIVEROS, M. J. Some thoughts about barriers to access to a possible vaccine against the covid-19. Con-texto, [S. l.], n. 55, p. 113–121, 2021. DOI: 10.18601/01236458.n55.10. Disponível em: https://revistas.uexternado.edu.co/index.php/contexto/article/view/7384. Acesso em: 24 abr. 2024.