Mayo study shows multimorbidity in RA increases serious infx (SI) risk; 911 RA pts (56 yrs, 2/3 seropositive) 17% had SI (3.9/100PY). Hi risk morbidities(bipolar Dz, CKD, COPD,, chr skin ulcers) were assoc w/ 3 to 5-fold increased SI risk https://t.co/qorKp96KTm https://t.co/o5FaMKMskA