[{"arm_notes": "", "treatment_id": null, "treatment_name": "TODO PreventionIntervention group: Healthcare workers who are exposed to the pandemic virus (COVID-19) will be randomly assigned to receive 0.1 ml intradermal injection of BCG vaccine. All participants will be followed-up for 12 months by text messages (up to weekly). The Mantoux Tuberculin skin test (before receiving the BCG vaccine) will be performed by intradermal injection of 0.1 ml (PPD) in front of the left forearm. This test will be read after 48-72 hours, a positive tuberculin test is 10 mm or more. Blood samples will be collected at the beginning and 12 months for PCR and antibody detection.", "treatment_type": "TODO", "pharmacological_treatment": "TODO"}, {"arm_notes": "", "treatment_id": null, "treatment_name": "TODO PlaceboControl group: Healthcare workers who are exposed to the pandemic virus (COVID-19) will be randomly assigned to receive 0.1 ml intradermal injection of BCG vaccine. All participants will be followed-up for 12 months by text messages (up to weekly). The Mantoux Tuberculin skin test (before receiving the BCG vaccine) will be performed by intradermal injection of 0.1 ml (PPD) in front of the left forearm. This test will be read after 48-72 hours, a positive tuberculin test is 10 mm or more. Blood samples will be collected at the beginning and 12 months for PCR and antibody detection.", "treatment_type": "TODO", "pharmacological_treatment": "Placebo"}]

[{"arm_notes": "1", "treatment_id": 2187, "treatment_name": "Placebo", "treatment_type": "Placebo", "pharmacological_treatment": "Placebo"}, {"arm_notes": "1", "treatment_id": 186, "treatment_name": "Bcg vaccine", "treatment_type": "Non covid vaccine", "pharmacological_treatment": "Non covid vaccine"}]