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[{"arm_notes": "1", "treatment_id": 774, "treatment_name": "Measles mumps rubella vaccine", "treatment_type": "Non covid vaccine", "pharmacological_treatment": "Non covid vaccine"}, {"arm_notes": "1", "treatment_id": 2187, "treatment_name": "Placebo", "treatment_type": "Placebo", "pharmacological_treatment": "Placebo"}]