[{"arm_notes": "nan", "treatment_id": null, "treatment_name": "High-dosage COVID-19 Vaccine,Inactivated", "treatment_type": "Biological", "pharmacological_treatment": "Non pharmacological treatment"}, {"arm_notes": "nan", "treatment_id": null, "treatment_name": "Medium-dosage COVID-19 Vaccine,Inactivated", "treatment_type": "Biological", "pharmacological_treatment": "Non pharmacological treatment"}, {"arm_notes": "nan", "treatment_id": null, "treatment_name": "Placebo-comparator group", "treatment_type": "Biological", "pharmacological_treatment": "Non pharmacological treatment"}]

[{"arm_notes": "medium booster dose;5-8 months after 2 doses of CoronaVac\u00ae (medium-dose COVID-19 Vaccine) in an interval between 21-56 days", "treatment_id": 327, "treatment_name": "Coronavac", "treatment_type": "Inactivated virus", "pharmacological_treatment": "Vaccine"}, {"arm_notes": "high booster dose;5-8 months after 2 doses of CoronaVac\u00ae (medium-dose COVID-19 Vaccine) in an interval between 21-56 days", "treatment_id": 327, "treatment_name": "Coronavac", "treatment_type": "Inactivated virus", "pharmacological_treatment": "Vaccine"}, {"arm_notes": "", "treatment_id": 2187, "treatment_name": "Placebo", "treatment_type": "Placebo", "pharmacological_treatment": "Placebo"}]