The AIIMS Ethics Committee on Saturday gave its nod for a human clinical trial of the indigenously developed Covid-19 vaccine candidate Covaxin following which the premier hospital is likely to begin the exercise by enrolling healthy volunteers from Monday. AIIMS-Delhi is among the 12 sites selected by the Indian Council for Medical Research (ICMR) for conducting phase I and II human trials of Covaxin. In phase I, the vaccine would be tested on 375 volunteers and the maximum of 100 of them would be from AIIMS.