add a small line with history (which can be stored in cookies)
as a line below the graph
last: US, RU, DE, BB, GE
tooltip can show the full country names
motivation:
when i look through some countries they are on different pages, when i like to see them often then i have to go always to the deep page again to see the values
since the values are not sortet countries with few cases are mixed with countries with many cases and then the graph is not that detailed, because the graph is depending on max cases by the visible countries
otherwise it sum up to much, for example in a country with 11c and 11c it shows up 22 in total on the bar half blue and half red, but it should show full blue, because from the 11c are 11recovered