Can We Predict the Appearance of the Most Virulent COVID-19 Outbreaks in the World?

The COVID-19 pandemic has spread throughout the world at great speed, however, its capacity for expansion and therefore its impact on a country's health system and its economy is not the same in the different areas of the world. In this work, we present a study on the influence of temperature on the speed of virus transmission. The study has been carried out with data collected in a narrow time window, one month, and from a reduced geographical area such as a single country, as Spain, or a cruise such as the Diamond Princess. The objective is to have the data as homogeneous as possible and try to minimize the influence of factors that are not strictly environmental. The result is that there is a clear relationship between the temperature and the speed of virus spread.