L. Campos, K. Mansinho, P. Telles de Freitas, V. Ramos, and C. Sakellarides, “COVID-19 and Seasonal Flu During the Autumn-Winter of 2020/2021 and the Challenges Lying Ahead for Hospitals”, Acta Med Port, vol. 33, no. 11, pp. 716–719, Nov. 2020.