Campaign Ambassador Amitabh Bachchan talks about the hope around the vaccine for COVID-19 and says, "Obviously, we will all have to have some kind of hope that the medical fraternity will develop some kind of relief to this disease. And yes, we do hope that the vaccine does come out and becomeS effective and bring some kind of confidence among people. There have been cases when the vaccine have not work and some where it has worked. This will always happen - in some kind of cases people react positively to the vaccine in some they don't. That's going to be a perennial kind of a thought."