[{"arm_notes": "", "treatment_id": null, "treatment_name": "TODO PreventionIntervention group: Health workers exposed to the epidemic virus (COVID-19) who were randomly selected after registering personal information including name, gender, age, weight, place of residence, occupation, presence of underlying diseases And disease characteristics were randomly divided into one of two experimental and control groups based on AB and BA random block design. Is placedIf their antibody level is not safe for measles, mumps or rubella, the vaccine will be injected. It is injected according to the protocol of the Ministry of Health. External substance prescribed: MMR vaccine - Participants in the intervention group will receive a dose of MMR vaccine at the rate of 0.5 cc by subcutaneous method (SC)Then, in three periods of two, six and twelve months, the results of the desired indicators are collected. In addition, all subjects in both groups will be routinely searched for signs and symptoms associated with acute respiratory infection / Covid-19. Also, at baseline and 12 months later, serum interferon gamma levels and antibody titers against measles, rubella, and mumps, and if available, IgG and IgM antibody titers against SARS-CoV-2 swabs for PCR measurement. Is taken", "treatment_type": "TODO", "pharmacological_treatment": "TODO"}, {"arm_notes": "", "treatment_id": null, "treatment_name": "TODO PreventionControl group: Health workers exposed to the epidemic virus (COVID-19) who were randomly selected after registering personal information including name, gender, age, weight, place of residence, occupation, presence of underlying diseases And disease characteristics were randomly divided into one of two experimental and control groups based on AB and BA random block design. Is placed.In this group, the vaccine is not injected to evaluate the efficacy of MMR vaccine in the intervention group.Then, in three periods of two, six and twelve months, the results of the desired indicators are collected. In addition, all subjects in both groups will be routinely searched for signs and symptoms associated with acute respiratory infection / Covid-19. Also, at baseline and 12 months later, serum interferon gamma levels and antibody titers against measles, rubella, and mumps, and if available, IgG and IgM antibody titers against SARS-CoV-2 swabs for PCR measurement. Is taken", "treatment_type": "TODO", "pharmacological_treatment": "TODO"}]

[{"arm_notes": "", "treatment_id": 2188, "treatment_name": "Standard of care", "treatment_type": "Standard of care", "pharmacological_treatment": "Standard of care"}, {"arm_notes": "1", "treatment_id": 774, "treatment_name": "Measles mumps rubella vaccine", "treatment_type": "Non covid vaccine", "pharmacological_treatment": "Non covid vaccine"}]