The Vaxx is recording the thoughts and memories of the vaxxed, and that info is being stored in the Mother Computer to place them in the "matrix" until such a time that there thoughts and memories can be "downloaded" into a new body.
That body can be a cloned body, or it can be a robot body.
That is the purpose of "the Vaxx", as there is an extermination event coming soon, and most of the planet will be destroyed and civilization will disappear.
The Vaxx is the plan to "save" humanity…literally in the sense of saving, as in "saving" on a computer.