The press releases of the World Health Organization regarding pandemics and their impact on pharmaceutical companies listed in the Standard & Poor’s 500 index. estud.gerenc. [Internet]. 2021 Jan. 27 [cited 2026 Oct. 21];37(158):3-16. Available from: https://www.icesi.edu.co/revistas/index.php/estudios_gerenciales/article/view/4162