Ortiz-BarbozaA., Alvarado-PradoR., and Loaiza-ValverdeY. “Impact of Vaccination on Respiratory Infections in Employees of Companies Affiliated With the Corporate Department of a Private Hospital in Costa Rica, March–July 2023”. Acta Académica, Vol. 79, no. Noviembre, Nov. 2026, pp. 95-12, http://revista.uaca.ac.cr/index.php/actas/article/view/1434.