@Perfect28
Well, if we have a vaccinated work force making vaccines, our forces are not needed at home so are available to handle logistics not to mention the military doctors and nurses, if our trained vaccinators are free to travel abroad (and without fear of contracting the virus) and we have the Money to fund it, we could be doing every step of the vaccine process in other counties. We can also donate surplus vaccines.
Also, the better funded our own vaccination programmes are, the more research we will be funding for better more effective vaccines, vaccines that might work if there are new strains, and the more money we have to fund vaccines for others.