text:  sup 18 sup F FDG PET CT in SARS CoV 2 infection and its sequelae In recent months much of the scientific efforts have focused on research on SARSCoV 2 infection and its consequences in humans Still many aspects remain unknown It is known that the damage caused by SARS CoV 2 is multifactorial and that its extension goes beyond lung inflammation and the acute phase with the appearance of numerous complications and sequelae To date knowledge about the usefulness of sup 18 sup F FDG PET CT in the acute phase has been limited to the incidental detection of SARS CoV 2 unsuspected pneumonia Recent studies have been appearing collecting the findings of sup 18 sup F FDG PET CT in long COVID 19 or persistent COVID 19 state as well as the alterations caused after mass vaccination of the population in the metabolic studies This work aims to review the existing literature focusing on these three issues and to briefly present our own preliminary experience 