[{"arm_notes": "nan", "treatment_id": null, "treatment_name": "MMR vaccine", "treatment_type": "Biological", "pharmacological_treatment": "Non pharmacological treatment"}, {"arm_notes": "nan", "treatment_id": null, "treatment_name": "MMR vaccine", "treatment_type": "Biological", "pharmacological_treatment": "Non pharmacological treatment"}]

[{"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"}]