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

[{"arm_notes": "Group of immunocompromised vs non immunocompromised (vaccinated either with two doses of ComirnatyTM or, in a subgroup, with one dose of Astra Zeneca's VaxzeriaTM followed by one dose of ComirnatyTM)", "treatment_id": 222, "treatment_name": "Bnt162b2", "treatment_type": "Rna based vaccine", "pharmacological_treatment": "Vaccine"}]