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. 2022 Mar;28(3):582–590. doi: 10.3201/eid2803.212131

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Emerging Infectious Diseases is a publication of the U.S. Government. This publication is in the public domain and is therefore without copyright. All text from this work may be reprinted freely. Use of these materials should be properly cited.

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Overseas TB medical examination pathway and TB classifications for US immigrant visa applicants and modifications for the Preventing Tuberculosis Overseas Pilot Study, Vietnam, 2018–2019. TB classifications for overseas medical examination outcomes: No TB classification, no TB disease or infection; class A, TB disease (treatment completion required); class B0, completed treatment for TB disease by directly observed therapy supervised by panel physician; class B1, clinical signs, symptoms, or chest radiograph suggestive of TB or known HIV infection but negative sputum smears and culture; class B2, LTBI evaluation. CDC, Centers for Disease Control and Prevention; IGRA, interferon-γ release assay; LFTs, liver function tests; LTBI, latent tuberculosis infection; TB, tuberculosis.