True, but I think your statement speaks to the argument that the author was making. There isn't an official "contract", but there is an implicit one. Since the

True, but I think your statement speaks to the argument that the author was making. There isn't an official "contract", but there is an implicit one. Since they DWB cannot get the vaccine on their own (buying it), donations make them beholden to the will of the donor. So if Pfizer or GSK say, "Hey, we REALLY would like these vaccines to not go to North Korea", and DWB sends vaccines to NK, then the donors can/will take that into consideration when donating the next round. That gives drug companies control over the healthcare that these organizations are providing.