[{"arm_notes": "", "treatment_id": null, "treatment_name": "elderly group:covid-19 inactivated vaccine;", "treatment_type": "TODO", "pharmacological_treatment": "TODO"}]

[{"arm_notes": "", "treatment_id": 643, "treatment_name": "Inactivated covid-19 vaccine", "treatment_type": "Inactivated virus", "pharmacological_treatment": "Vaccine"}]

[{"arm_notes": "", "treatment_id": null, "treatment_name": "elders cohort:covid-19 inactivated vaccine;", "treatment_type": "TODO", "pharmacological_treatment": "TODO"}]

[{"arm_notes": "2;Days0-21 or 28", "treatment_id": 643, "treatment_name": "Inactivated covid-19 vaccine", "treatment_type": "Inactivated virus", "pharmacological_treatment": "Vaccine"}]