Even though the number of cases is still increasing in Italy as seen on the linear graph, the data plotted on a logarithmic scale provides a better picture of the spread of the virus showing that the infection rate is no longer exponential in Italy whereas it is increasing in the United States. Therefore, the logarithmic scale highlights that the crisis measures that were implemented by the Italian government are showing some positive results, but that there is no sign of the spread slowing down in the United States.
“Those skyrocketing curves tell an alarming story. But logarithmic graphs can help reveal when the pandemic begins to slow.”
– Kenneth Chang
Chang K., A Different Way to Chart the Spread of Coronavirus. The New York Times, March 20 2020