One problem with the vaccine is that it looks like the majority of people aren't going to take it. The radio station I listen to did a poll, and 82% of people said they weren't going to take it.
And it's not all the anti-vaxxers saying this, a couple of the DJs and a woman who called all said the same thing, they are just rushing this way to fast. That even makes me a little hesitant, at least for the first couple batches.
Well, of course the supplies would be limited to start with, so any working vaccine should go to the highest-risk segments of the population, such as the elderly and health care workers.
There's some promising evidence that an existing BCG tuberculosis vaccine is granting COVID resistance through an unexpected type of immunity: https://www.quantamagazine.org/trained-immunity-offers-hope-in-fight-against-coronavirus-20200914/