1. Patient above 18 yrs of age <br/ >2. Patients with diagnosed case <br/ >of Autoimmune Rheumatic Disease <br/ > 3. Patients who had completed Both dose of AZD 1222 vaccine and had a documentedCovid 19 infection (irrespective of the order ofImmune hit) <br/ >4. Patients who had completed both dose of <br/ >AZD1222 vaccine with no history of Covid infection (Controlgroup) <br/ > 5. Patients who are willing to provide informed consent <br/ >and to comprehend with the study <br/ >

1. Patient above 18 yrs of age <br/ >2. Patients with diagnosed case <br/ >of Autoimmune Rheumatic Disease <br/ > 3. Patients who had completed Both dose of AZD 1222 vaccine and had a documentedCovid 19 infection (irrespective of the order ofImmune hit) <br/ >4. Patients who had completed both dose of <br/ >AZD1222 vaccine with no history of Covid infection (Controlgroup) <br/ > 5. Patients who are willing to provide informed consent <br/ >and to comprehend with the study <br/ >