  After the breakout of the disease caused by the new virus COVID-19, the
mitigation stage has been reached in most of the countries in the world. During
this stage, a more accurate data analysis of the daily reported cases and other
parameters became possible for the European countries and has been performed in
this work. Based on a proposed parametrization model appropriate for
implementation to an epidemic in a large population, we focused on the disease
spread and we studied the obtained curves, as well as, we investigated probable
correlations between the country's characteristics and the parameters of the
parametrization. We have also developed a methodology for coupling our model to
the SIR-based models determining the basic and the effective reproductive
number referring to the parameter space. The obtained results and conclusions
could be useful in the case of a recurrence of this repulsive disease in the
future.
