Original ResearchPublished 3 September 2026Clinical phenotypes, endotypes, and biomarker profiles of immediate rituximab hypersensitivity reactions: a prospective pharmacovigilance studyNarapong Yotinnoratham · Wannada Laisuan · Kumutnart Chanprapaph · Silada Kanokrungsee · Chavachol Setthaudom · Supornchai Onpun · Pungjai Mongkolpathumrat · Supranee Buranapraditkun · Apinya Chungcharoenpanich · Nichapha Dechapaphapitak · Supa Oncham · Nattakirana Tongdee · Sananya Khamkaew · Ratchaya Lertnawapan · Jettanong KlaewsongkramFrontiers in Allergydoi 10.3389/falgy.2026.1903523