Chen R, Kunasekaran M, Moa A, Lim S, Chughtai A, Kpozehouen E, et al. Respiratory illness of unknown cause as an early signal of the COVID-19 pandemic . Global Biosecurity [Internet]. 2024 May 20 [cited 2024 Jul. 16];6(1). Available from: https://jglobalbiosecurity.com/index.php/up-j-gb/article/view/253