Unfortunately it doesnt work that way - the infrustructure required for the mass production doses (pfizer, moderna) is pretty huge and third doses will be avila

Unfortunately it doesnt work that way - the infrustructure required for the mass production doses (pfizer, moderna) is pretty huge and third doses will be avilable in most regions long before 'everybody else' has the proper infrustructure in place. For this, it isnt purely zero sum.