Retrospective, Observational Chart Review Study Conducted in Poland to Document the Management and Clinical Outcome of CUVITRU and HYQVIA in Pediatric Participants (< 18 Years) With Primary Immunodeficiency (PID)

The purpose of this observational, multi-center, retrospective cohort study is to assess treatment patterns of Cuvitru (SCIG) 20 percent (%) and HyQvia (fSCIG) in polish pediatric participants with PID. The study will collect pediatric patient data. These data are gathered and collected during routine clinical care. As this is a non-interventional/observational study, no treatment/pharmacotherapy is provided as part of the study.