Developed in record time, SARS-CoV-2 vaccines changed the course of the Covid pandemic that ravaged the world five years ago. In the first year of administration alone, they prevented 14.4 million deaths in 185 countries and regions, according to a study by Imperial College London published in The Lancet. This data was added to another later work by the WHO which estimated that these prophylactic drugs had prevented half of the hospitalizations due to covid in Europe, as well as 50% of the serious cases of the disease and deaths.