Covid19 2020 projection report: Germany, Israel, Italy and USA. Mid-July 2020

A notion of implied susceptible population size ISPS was introduced in the context of the SIR differential equations in Epidemiology, in a companion paper. It is the potential target population size for which the solution to the SIR equations would yield the current number of new affected cases. This notion is applied to the analysis and projection of Covid19 2020, illustrated on the data of Germany, Israel, Italy and USA.