R. E. Alvarado Chacón, E. G. . Vilema Vizuete, G. E. Cuello Freire, and V. K. Guevara Guamán, “Health situation facing COVID-19 in vulnerable indigenous communities of Pichincha, Ecuador. Systemic review”, Salud, Ciencia y Tecnología, vol. 4, p. 917, Apr. 2024, doi: 10.56294/saludcyt2024917.