Hi mama! Okay lang yan, mixing brands for MMR is generally safe, a few of us dito sa group ay ganyan din ang ginawa kaya don't worry too much about it. Best to confirm with your baby's pedia though para sure, lalo na kung may specific notes sila sa health records ninyo, kundi they can advise based sa exact brand ng first dose at ano ang available sa center. Good thinking ng mag-switch sa health center para makatipid, we do the same pag kaya na!