In 2014, epidemiologist Paolo Vines described in Salute senza confini how in a globalized and constantly changing world, where it is easier to travel but which is also more chaotic and difficult to control, the concepts of health and illness are changing: they are no longer simple biological processes but complex phenomena which involve the environmental, social, economic, political and cultural spheres.With a new chapter dedicated to Covid-19, Global health, common good explains that today, climate change, migratory flows, the economic crisis and the industrialization of food production are fundamental phenomena in order to understand the state of well-being (or illness) of populations, and offers a strong argument on the political level: in such a mobile and articulated panorama, health at global level could be going towards a deterioration similar to what happened in 2008 with the economy.