While I agree, I suspect the major issue at this point is not availablity (well, maybe for the newer vaccine variants), but the cost and complexity of distribution.

That isn't to say they should just let them expire, but it is a bit different than sitting on vaccines that could have easily been used elsewhere.

Are there still countries that can't get vaccines?

I understand that there are logistical issues with storing, transporting, and administering vaccines in some countries, but I was under the impression that supply was no longer an issue.

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