During the COVID-19 pandemic, there have been many numbers of infected, hospitalized, deaths and so on. The example below shows how infection numbers in the Danish ‘kommuner’ (municipalities) change over time, which gives a much more general picture of the development of the pandemic. Here, the heigth of the municipality (and the heat color) is used as an indicator of the relative level of COVID-19 infected. The data are from Statens Serum Insititut.