I put together this graph of active known coronavirus cases worldwide since 1/20/2020 using the data from this Johns Hopkins website:

https://www.arcgis.com/apps/opsdashboard/index.html#/bda7594740fd40299423467b48e9ecf6

I am not a doctor, an expert in infectious disease, or a scientist, just a data nerd. I had not seen the data presented this way yet and thought it was interesting. This data is as of 8:00 AM on 2/28/2020.