Mass Gen Brigham study of Rheum (SARD) pts COVID severity over time (3/20-1/22) shows less severe COVID over time. 1449 SARD pts had COVID-19 (1/3 RA); 28% severe. Early COVID was more severe (46%) vs 15% w/ Omicron. Unvax were more severe (78% v 60%) https://t.co/DTge2od82Q https://t.co/LXeujT6zd5