(* date,cases,deaths   *)
(* Quelle: https://raw.githubusercontent.com/nytimes/covid-19-data/master/us.csv *)
A={
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{2020-01-22,1,0},
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S=ListPlot[Table[A[[k, 3]]/A[[k, 2]], {k, Length[A]}]];
Export["usa.png",S,"PNG"]