new delhi the centre has asked states to carefully authenticate anticovid jabs before administering them to people the move comes in the wake of the world health organisation raising concern last month about counterfeit versions of covishield circulating in the international market while the centre had apprised states about certain parameters that they should monitor to recognise counterfeits the health ministry again issued a letter to states earlier this week asking them to keep a close watch in a letter to states and uts dr manohar agnani additional secretary in the health ministry highlighted information on genuine vaccine labels and additional information of the vaccines currently in use in india covishield covaxin and sputnik v agnani asked states to share the information with the program managers and service providerswatch authenticate before use centre writes to states over fake vaccines