The Covid-19 pandemic changed the world.Indeed a real race took place worldwide between SARS-CoV-2 on the one hand and researchers on the other – especially those specializing in messenger RNA vaccines. Four years after its emergence, the pandemic is not over, but some decisive battles have been won, thanks to the great success of mRNA vaccines.The Marathon of The Messenger presents the history of these mRNA vaccines, combining a scientific background with historical and ec...