[{"arm_notes": "nan", "treatment_id": null, "treatment_name": "Heterologous boost schedule", "treatment_type": "Biological", "pharmacological_treatment": "Non pharmacological treatment"}, {"arm_notes": "nan", "treatment_id": null, "treatment_name": "Homologous boost schedule", "treatment_type": "Biological", "pharmacological_treatment": "Non pharmacological treatment"}]

[{"arm_notes": "Mrna-1273, day 0, Mvc-cov1901, day 28", "treatment_id": 1997, "treatment_name": "Mrna-1273+mvc-cov1901", "treatment_type": "Rna based vaccine+protein subunit", "pharmacological_treatment": "Vaccine"}, {"arm_notes": "2, days0-28", "treatment_id": 824, "treatment_name": "Mrna-1273", "treatment_type": "Rna based vaccine", "pharmacological_treatment": "Vaccine"}]