Vaccination against Covid-19 will require complex logistics

Who should be vaccinated first? Bary Pradelski, from the French National Center for Scientific Research and the Oxford-Man Institute, and Miquel Oliu-Barton, from Paris-Dauphine University, have proposed that countries define red and green zones, depending on whether there is a high or low coronavirus incidence, with controls to move from one to another (such as perimeter closures).