Priority List for Vaccine: Include those aged 50 and above: experts Experts have stressed the need for including all aged 50 and above in the priority list for the first phase of Covid-19 vaccination to maximise the effectiveness of the inoculation campaign. Besides, they have suggested a longer gap between the administration of the first and second shots, arguing that it will make the vaccine more efficient. The government is set to roll out its coronavirus vaccination programme in the first week of next month. It has purchased 3 crore shots of the Oxford-AstraZeneca vaccine, branded Covishied, from Serum Institute of India, and plans to vaccinate 1.5 crore people in the first phase.