I have put together some code to analyse the Johns Hopkins Covid-19 global stats that are updated regularly.
Use the drop down boxes below to pick analysis on either Confirmed Cases or Deaths and a country to see the results.
The code looks at a country to see if there has been a change in the exponential rate of growth of cases. The series starts from the point where 100 cases were recorded for confirmed cases and 10 cases for deaths.
If is the cumulative number of confirmed cases or deaths then exponential growth with look something like the following after days.
If exponential growth is constant the will not change over time. Note that exponential growth implies that . If changes over a period of time then we can see if the country has changed to a new level of exponential growth.