Despite rising infection numbers, contact restrictions could be avoided if the vaccination rate were fast enough. Professor Claudius Gros from Goethe University Frankfurt and Dr Daniel Gros from the Center for European Policies Studies in Brussels have developed a simple mathematical relation which allows to estimate the rate of vaccination necessary to maintain control of the pandemic without a lockdown and while avoiding overwhelming the health system and a spike in death rates. The study has been vetted and is forthcoming in Covid Economics.