MTX lowers risk of serious infxn (SI) - UK Observational study of 17 472 newly Dx RA (2018–2023); 10K on MTX, 4,540 other csDMARDs; 13680 corticosteroids (GC). 1307 SI (3/100 PY) w/ reduced adj HR 0.72 (95% CI: 0.63–0.82). 311 SI-related mortality (IR 0.69;0.61–0.77) https://t.co/iuxAivtrYZ