URL https://www.researchgate.net/publication/370809297/figure/fig1/AS:11431281159139961@1684289866710/Schematic-diagram-illustrating-the-COVID-19-transmission-in-the-local-outbreak-in.png
URL2 https://www.researchgate.net/figure/Schematic-diagram-illustrating-the-COVID-19-transmission-in-the-local-outbreak-in_fig1_370809297