Most indicators about #COVID19 show current values of people infected, deceases and recovers. Monitoring those parameters is, indeed, a key input for taking action in logistic activities associated to the healthy policies.
"COVID-19 in derivatives" brings more information useful for logistic planning. The key parameter is the rate of change of the number of persons getting infected per day (first derivative). If the rate of change is high, severe actions need to be taken to avoid the widespread.
The second derivative gives information about a possible accelerated behavior in the spread. Positive values should be taken as a critical condition and further measures to avoid the spread should be taken.