Original ResearchPublished 12 October 2026Factors associated with severe disease and in-hospital mortality in children with non-HIV-associated Pneumocystis jirovecii pneumonia: a single-center retrospective cohort studyJunjie Ning · Dan Chen · Zhidong Yu · Fajuan Tang · Lina QiaoFrontiers in Cellular and Infection Microbiologydoi 10.3389/fcimb.2026.1937817