At the date of this writing the Coronavirus is spreading very quickly and in Europe we are all at risk. We can also see what is the risk of importing the 2019-nCoV (COVID-19) virus in Europe per country in this representation of Eurosurveillance by the European Centre for Disease Prevention and Control (ECDC). If we want to know how to prevent coronavirus and other virus or bacteria infections or if we want to know how to cure virus flu, it's worth to know more about how the immune system works, and what to d o to make it work better. The goal of this article is to promote health, (...)