Every applicant who is applying for the Green card, irrespective of age has to go in for the Immigration Medical Exam. There are some health-related grounds on which the applicant becomes inadmissible. Let us take a look at these:

• Communicable disease of public health significance (Class A)
• Failure to show proof of required vaccinations (for lawful permanent resident applicants ONLY)
• Physical or mental disorder with associated harmful behavior (Class A)
• Drug abuse or addiction (Class A)

There is a form called the I-693 form or the Civil Surgeon worksheet which the Civil Surgeon fills up as a part of the process.

Let us take a look at a part of Section 1 of the form which relates to communicable diseases, beginning with Tuberculosis in subsection A:

• Civil surgeons should review TIs on Tuberculosis at:
• Civil surgeons should also review updates to the Tis at:
• Civil Surgeons: Steps for performing the TB component of the Immigration Medical Exam: 

STEP 1: If the applicant is age-appropriate, the applicant should be screened for TB with a cell-mediated immunity test (TST or IGRA).

• Generally, all applicants 2 years of age and older must be screened regardless of pregnancy or previous immunization with BCG vaccine.
• Applicants under 2 years of age must also be screened if there is evidence of contact with a person known to have TB or any other reason to suspect TB.
• Applicants may be exempted from a screening test in some circumstances.