The fact that the vaccine is 90% effective is great because it really lessens the worry that a large group of people will not want to take the vaccine for whatever reason. If it's 90% effective, I can just take it and not worry too too much that I'll end up with it. And all the better if I don't have to wait in a long line.
If it was 50% effective, I'd be worried because I'd need more of the population to have it to create the protection that herd immunity affords.
So the fact that a large number of people are nervous about the vaccine becomes more of a non-story. With that said, I fully expect there to be massive demand for the vaccine, especially knowing that it'll probably be approved within the next month but not available to a lot of us until March or April.
What I think will happen is a lot of countries will ask for proof of vaccination before entering (I've experienced this in the past with yellow fever when I went to Brazil in 2014). This alone will probably make more reluctant adopters to relent. But like I said, at 90% it probably doesn't matter a ton.
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