Coronavirus infection rates and case numbers are a growing concern in England. So analysing change-over-time in growth rates, as well as both absolute (total number) and relative cases counts (as a proportion of population size) is particularly important.
Doing this analysis for multiple areas at the same time (e.g. for Local Authorities in England) is a considerable challenge, but well-designed visualizations have a role to play and can expose some important patterns when we look at rates and numbers across the country.
Roger Beecham and Jason Dykes discuss ways in which this might be achieved in their Coronavirus Visualization twitter thread.