Study of 197 AAV pts in RAVE trial (RTX vs CTX; followed by AZA) showed most serious infections (82%) occurred in 6 mos (68% Resp infx) & assoc w/ lower#s CD19+ cells. TMP/SMX prophylaxis against P. jirovecii decreased SIE rates https://t.co/oz530OkGs8 https://t.co/YFW7PD6wrW