NIAID will study COVID‐19 Booster Vaccine in Autoimmune Disease Non‐Responders (including MS, RA, SLE, Scleroderma,pemphigus); 20 sites, 600 pts (taking MTX, MMF or RTX) w/ poor resp to mRNA vax & recv 3rd booster vax. https://t.co/YwCvGnX21F https://t.co/th2WoRv1ng