2,944,771.0 As the next phase of vaccination began on March 1, we take a look at the two vaccines - Covishield and Covaxin. The next phase of the vaccine includes those who are above 60 years of age and those above 45 years of age with co-morbidities. Oxford-AstraZeneca-made Covishield is based on the viral vector platform. The vaccine is made by genetically engineering adenovirus that normally infects chimpanzees. It uses double-stranded DNA. Bharat Biotech-made Covaxin is based on an inactivated form of the coronavirus. Both the vaccines follow a two-dose regime 28 days apart. The two vaccines do not require sub-zero temperatures to store. These can be stored at 2-8 degree centigrade.