1. renal transplantation \< 3 months; 2. pregnancy or lactation status; 3. rejection treated within the last 6 months; 4. presence of humoral immunity to sars-cov-2 defined as the presence of specific igm/igg.

1. renal transplantation \< 3 months; 2. pregnancy or lactation status; 3. rejection treated within the last 6 months; 4. presence of humoral immunity to sars-cov-2 defined as the presence of specific igm/igg.

renal transplantation < 3 months; pregnancy or lactation status; rejection treated within the last 6 months; presence of humoral immunity to sars-cov-2 defined as the presence of specific igm/igg.

renal transplantation < 3 months; pregnancy or lactation status; rejection treated within the last 6 months; presence of humoral immunity to sars-cov-2 defined as the presence of specific igm/igg.

1. renal transplantation < 3 months; 2. pregnancy or lactation status; 3. rejection treated within the last 6 months; 4. presence of humoral immunity to sars-cov-2 defined as the presence of specific igm/igg.

1. renal transplantation < 3 months; 2. pregnancy or lactation status; 3. rejection treated within the last 6 months; 4. presence of humoral immunity to sars-cov-2 defined as the presence of specific igm/igg.