It's important to note that no member of the WTO has said they are opposed to the waiver—at least the current proposal that's on the table. Every member is willing to engage. The fundamental issue for many members will be—and I don't feel particularly comfortable speaking on their behalf— whether this will actually increase vaccine production and allow more people to be vaccinated. That will be the fundamental question. That is the stated rationale for the waiver; that is the test by which it needs to be measured and that will be the test when it is being discussed.
On May 28th, 2021. See this statement in context.