Evolution of COVID-19 in Italy, Spain, United Kingdom and the United States

This paper aims to help the authorities but especially the EU / EEA public health authorities in monitoring and managing the COVID-19 pandemic. The study provides concrete data on up-to-date and future developments in different countries and territories. The best results can be analyzed and pharmaceutical measures can be implemented in other countries. Thus, in order to have a clear picture of the danger of COVID-19, we studied a possible method of calculating the death rate among the positively confirmed cases. Thus, we have developed different equations, specific for each country, with which we can calculate the death rate. For example, for cases up to 19.03., For Italy, the death rate after 9 days was 25.58170% (9136 deaths / 28.03.) practically theoretically 24.8% (8857 deaths); for cases up to the date of 4.04. the death rate at a minimum of 9 days was 16.6081% (19901 deaths / 13.04.) practically and theoretically 16% (19172 deaths); for the date of 19.04. the death rate will theoretically be 16.49187% and 23686 deaths, ie from 14.04. by including 19.04 there will probably be 3785 deaths. The method can be used for Italy, Spain and United States of America or other countries. The advantage of this method is that it is specific to each country. It helps us to have an overview and correlating with the number of tests and the age of the patients to choose the best treatments.