Its interesting that now they are saying there will be enough vaccine for everyone. Initially, I thought there was going to be a shortage of vaccine, so it would only go to "high risk" populations and health care workers.
I think it's great that there a four manufacturers for the vaccine. But, reading between the lines, they are guessing that a sizeable proportion of people will elect not to take the vaccine (at least immediately).
Lets hope H5 doesn't have the same idea... :)