#ACR21 Ab#L03: B cell depletors and #COVID19 vax: ⭐️B cell count <40 around vax had lower response to vax, than 40+ B-cell, independent of RTX or BEL ▶️ Timing of vax around B cell return can improve response @Rheumnow https://t.co/1B7Bnb1QQu https://t.co/bKnfw6gD8O