Anyone applying for a Green Card or an immigrant visa into the United States must undergo a medical exam including a vaccination assessment. Here are some of the applicant categories who are required, or need not go through the Immigration Medical Examination as a mandatory part of the Green Card or Immigrant visa procedure:

K and V temporary visa applicants: K Visa applicants are fiancées or spouses of a US citizen. V Visa applicant categories consist of spouses or children of a lawful permanent resident. Applicants in both these categories are required to appear for the Immigration Medical Examination, but are not required to comply with the vaccination requirements at that time.

Refugees:  People who stay outside of the United States and who apply for a visa must undergo the Immigration Medical Examination. They are not required to comply with the vaccination requirements at this time.

Asylees: Individuals who are already in the United States and who are applying for Asylum are not required to appear for the Medical Examination.

Refugee adjustment applicants: To become eligible for Adjustment of status refugees one year has to elapse- one year after their initial refugee admission. When they apply for Adjustment of Status, however, they will not be required to repeat the medical examination that they had overseas, unless a medical ground of inadmissibility has been discovered.  But these refugee adjustment applicants must still comply with the vaccination requirements and submit the vaccination sign-off form that supports the Adjustment of Status application.