From the series The struggle against coronavirus According to the British analyst firm Airfinity, some 9.5 billion doses of Covid-19 vaccines will be produced worldwide in 2021. This number is double the annual production of all types of vaccines in the pre-pandemic era (5 billion, excluding oral polio, travellers’ and military vaccines), and can be compared with the requirement of 11.5 billion to immunise two-thirds of the world’s population [Airfinity, March 8th]. The development of vaccines has been exceptionally rapid, but manufacturing them on a large scale has encountered difficulties and delays. In 2020, only 4% of the expected doses were in fact produced [ibidem]. Production is concentrated in a limited number of countries, largely interdependent due to supply chains that cross state borders and continents. The World Bank identifies, among the producing countries, a Covid-19 vaccine producers club of 13 countries that manufacture both the active ingredient and its component...