{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T20:22:21Z","timestamp":1791490941085,"version":"4.3.4"},"reference-count":86,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2025,11,21]],"date-time":"2025-11-21T00:00:00Z","timestamp":1763683200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Preventive Medicine Association of Hubei Province","award":["2025SWGKY391"],"award-info":[{"award-number":["2025SWGKY391"]}]},{"name":"Wuhan Pulmonary Hospital, Wuhan Institute for Tuberculosis Control, Hubei Province Branch of National Center for Clinical Medicine of Infectious Diseases","award":["WF2025Y08"],"award-info":[{"award-number":["WF2025Y08"]}]},{"name":"Wuhan Pulmonary Hospital, Wuhan Institute for Tuberculosis Control, Hubei Province Branch of National Center for Clinical Medicine of Infectious Diseases","award":["WF2025Z01"],"award-info":[{"award-number":["WF2025Z01"]}]},{"name":"Wuhan Pulmonary Hospital, Wuhan Institute for Tuberculosis Control, Hubei Province Branch of National Center for Clinical Medicine of Infectious Diseases","award":["WF2025Y07"],"award-info":[{"award-number":["WF2025Y07"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Vaccines"],"abstract":"<jats:p>Bacille Calmette-Gu\u00e9rin (BCG) remains the only licensed vaccine against tuberculosis (TB), administered to &gt;100 million neonates annually. It confers approximately 70\u201380% protection against tuberculous meningitis and miliary TB in early childhood, under-pinning its continued use in high-burden settings. As a live-attenuated vaccine, however, BCG can rarely cause adverse reactions ranging from self-limited local lesions to life-threatening disseminated BCG disease (BCGosis), which almost exclusively occurs in infants with severe primary or acquired immunodeficiencies such as SCID, MSMD, CGD, or symptomatic HIV infection. Implementation of universal newborn screening for severe combined immunodeficiency (SCID) using the T-cell receptor excision circle (TREC) assay now enables prospective identification and deferral of these high-risk neonates, virtually eliminating fatal BCGosis. Here we synthesize global data published since 2010 on the clinical spectrum, immunopathogenesis, and epidemiology of BCG-related complications, highlighting the impact of vaccine substrain, administration technique, and host immune status on adverse-event rates. On the basis of this evidence, we propose a practical, evidence-based risk-assessment checklist (BCG-RAKE) to support safer vaccine deployment while preserving the substantial TB-control benefits of universal BCG immunization.<\/jats:p>","DOI":"10.3390\/vaccines13121179","type":"journal-article","created":{"date-parts":[[2025,11,21]],"date-time":"2025-11-21T12:41:58Z","timestamp":1763728918000},"page":"1179","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["BCGitis and BCGosis: Clinical Spectrum, Immunological Mechanisms, and Risk Management"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4863-4806","authenticated-orcid":false,"given":"Qibin","family":"Liu","sequence":"first","affiliation":[{"name":"Wuhan Pulmonary Hospital, Wuhan Institute for Tuberculosis Control, Hubei Province Branch of National Center for Clinical Medicine of Infectious Diseases, Wuhan\u00a0430000, China"},{"name":"National Engineering Research Center for Nanomedicine, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiyong","family":"Dai","sequence":"additional","affiliation":[{"name":"Wuhan Pulmonary Hospital, Wuhan Institute for Tuberculosis Control, Hubei Province Branch of National Center for Clinical Medicine of Infectious Diseases, Wuhan\u00a0430000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5322-9667","authenticated-orcid":false,"given":"Shuang","family":"Wei","sequence":"additional","affiliation":[{"name":"Wuhan Pulmonary Hospital, Wuhan Institute for Tuberculosis Control, Hubei Province Branch of National Center for Clinical Medicine of Infectious Diseases, Wuhan\u00a0430000, China"},{"name":"Research Institute of Pulmonary Infectious Diseases, Jianghan University, Wuhan 430000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,11,21]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"e2","DOI":"10.1016\/S1473-3099(21)00403-5","article-title":"100 Years of Mycobacterium bovis Bacille Calmette-Gu\u00e9rin","volume":"22","author":"Lange","year":"2022","journal-title":"Lancet Infect. 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