Inclusion Criteria:  Patients with known chronic inflammatory rheumatism, auto-immune or auto-inflammatory diseases (Rheumatoid arthritis, Spondyloarthritis, Psoriatic arthritis Lupus, Sjögren's syndrome, Inflammatory Myositis, Systemic Vasculitis, Sarcoidosis, Scleroderma, PPR/Horton's, other ...) At least 18 years old SARS-Cov-2 infection (COVID-19) by biological data (serological or positive Cov-2 PCR) or CT scan images or clinical observations consistent with covid-19 between January 2020 and September 2020 data available in the APHP health data center (EDS) or in the french RMD Covid19 cohort  Exclusion Criteria:  patients opposed to the use of their data