| H-1B visa category |
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| l | For
professionals working in specialty |
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| occupations;
limited to 65,000 annually |
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| l | Created
by Immigration Act of 1990 |
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| – | Pre-1990: Abnormal x-rays plus negative |
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| sputum
required waivers to enter country |
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| – | Post-1990: Liberalization: to discourage sub- |
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| optimal
overseas treatment |
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| l | Incidence
of TB? Unknown. |
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