[{"arm_notes": "nan", "treatment_id": null, "treatment_name": "Two doses of low dosage inactivated SARS-CoV-2 vaccine at the schedule of day 0,28", "treatment_type": "Biological", "pharmacological_treatment": "Non pharmacological treatment"}, {"arm_notes": "nan", "treatment_id": null, "treatment_name": "Two doses of medium dosage inactivated SARS-CoV-2 vaccine at the schedule of day 0,28", "treatment_type": "Biological", "pharmacological_treatment": "Non pharmacological treatment"}, {"arm_notes": "nan", "treatment_id": null, "treatment_name": "Two doses of placebo at the schedule of day 0,28", "treatment_type": "Other", "pharmacological_treatment": "Placebo"}]

[{"arm_notes": "300SU/0.5ml;2;day0-28", "treatment_id": 1923, "treatment_name": "Inactivated sars-cov-2 vaccine (vero cell)", "treatment_type": "Inactivated virus", "pharmacological_treatment": "Vaccine"}, {"arm_notes": "600SU/0.5ml;2;day0-28", "treatment_id": 1923, "treatment_name": "Inactivated sars-cov-2 vaccine (vero cell)", "treatment_type": "Inactivated virus", "pharmacological_treatment": "Vaccine"}, {"arm_notes": "", "treatment_id": 2187, "treatment_name": "Placebo", "treatment_type": "Placebo", "pharmacological_treatment": "Placebo"}]