Apparently, I am not the first one referring to the Corona coverage. In Germany, there is a great visualisation by Zeit Online. They combine a map to show where cases are identified with a histogram, showing the development within the last couple of weeks. It is an amazing tool to show how fast the virus spreads and how difficult it is to track its origins. https://www.zeit.de/wissen/gesundheit/2020-03/coronavirus-ausbreitung-zeitverlauf-landkreise-staedte-karte
Maybe Zeit Online did it. If not, I would suggest to turn the graphic into a GIF which could be easily shared through social media to attract readers to the article.