A record number of people - over 27 lakh - were vaccinated against the coronavirus by Uttar Pradesh on Tuesday, the highest doses administered by any state in a single day. This beat the national record set by Madhya Pradesh in June where over 16 lakh people were vaccinated in a single day. While UP's big vaccine push turned out to be very successful, how did it happen, and can it be repeated? NDTV's Alok Pandey reports.