The Covid-19 Immunisation Taskforce (CITF) will be introducing a two-factor authentication system to stop 'backdoor' vaccine agents from exploiting a loophole in the Malaysia Vaccine Administration System (MyVAS), according to Khairy Jamaluddin.<br /><br />Khairy, who is the minister in charge of the National Covid-19 Immunisation Programme (NIP), said the loophole was identified around the "Add Vaccinee" feature in the MyVas system.<br /><br />This feature sets appointments for vaccine recipients via the backend of the MySejahtera app.