42 C.F.R. § 34.3
(a) General. In performing examinations, medical examiners shall consider those matters that relate to the following:
(2) Documentation of having received vaccination against “vaccine-preventable diseases” for an alien who seeks admission as an immigrant, or who seeks adjustment of status to one lawfully admitted for permanent residence, which shall include at least the following diseases: Mumps, measles, rubella, polio, tetanus and diphtheria toxoids, pertussis, Haemophilus influenza type B and hepatitis B, and any other vaccinations recommended by the Advisory Committee for Immunization Practices (ACIP) for which HHS/CDC determines there is a public health need at the time of immigration or adjustment of status.
Provided, however, that in no case shall a Class A medical notification be issued for an adopted child who is 10 years of age or younger if, prior to the admission of the child, an adoptive parent or prospective adoptive parent of the child, who has sponsored the child for admission as an immediate relative, has executed an affidavit stating that the parent is aware of the vaccination requirement and will ensure that, within 30 days of the child's admission, or at the earliest time that is medically appropriate, the child will receive the vaccinations identified in the requirement;
(3)
(b) Scope of all medical examinations.
(1) All medical examinations will include the following:
(c) Additional medical screening and testing for examinations performed outside the United States.
(d) Risk-based approach.
(1) HHS/CDC will use the medical and epidemiological factors listed in paragraph (d)(2) of this section to determine the following:
(e) Persons subject to requirement for chest radiograph examination and serologic testing.
(1) As provided in paragraph (e)(2) of this section, a chest radiograph examination and serologic testing for syphilis shall be required as part of the examination of the following:
(2) Chest radiograph examination and serologic testing. Except as provided in paragraph (e)(2)(iv) of this section, applicants described in paragraph (e)(1) of this section shall be required to have the following:
(3) Immune response to Mycobacterium tuberculosis antigens.
(g) Failure to present records. When a determination of admissibility is to be made at the U.S. port of entry, a medical hold document shall be issued pending completion of any necessary examination procedures. A medical hold document may be issued for aliens who: