Also Read | Inside the farmer disquiet at Delhi’s doorstepThe advertisement also informed that Phase I/II trials (safety and immunogenicity) have already been completed.The hospital is one of the sites conducting the final phase of the trial of the vaccine, "Covaxin", and it needs around 1,500 volunteers for the purpose.AIIMS said that the persons who are interested in the trials may contact the hospital administration at the phone number 917428847499 or email at [email protected] last date of enrolment is December 31, 2020.Earlier, Union Health Minister Harsh Vardhan on December 19 had said that country's scientists and health experts have worked on the development of an indigenous vaccine and in the upcoming six to seven.