Fig. 1
From: Identification of transmission chains and clusters associated with COVID-19 in Tunisia
Cases were differentiated by respective generations of secondary infection (as of May 18 2020), origin of transmission (local/imported) and governorates. A total of 643 cases were presented after excluding 13 unclassified ones. Different generations were presented with circles of different size and a different shade of blue color (from the first to the seventh generation of secondary transmission the circles are smaller and less dark)