Under the immigration laws of the United States, a foreign national who applies for an immigrant visa abroad, or who seeks to adjust status as a permanent resident while in the United States, is required to receive vaccinations to prevent the following diseases:
Mumps
Measles
Rubella
Polio
Tetanus and Diphtheria Toxoids
Pertussis
Influenza Type B
Hepatitis B
Any other vaccine-preventable diseases recommended by the Advisory Committee for
Immunization Practices

This information could prove useful for those assisting a prospective immigrant. This being said, the rules and required vaccinations can be subject to frequent changes. Also, the US Embassy in Bangkok maintains a list of hospitals that are permitted to conduct medical examinations for US Immigration purposes. This list is subject to change and as a result those seeking medical examination for visa obtainment purposes would be wise to contact the United States Embassy in order to obtain the most up-to-date information.

In recent months, the United States Department of State and the Center for Disease Control have changed some of the rules regarding communicable diseases and United States Immigration. HIV has been taken off of the list of diseases that will act as a bar to admission into the United States. Therefore, those who previously were inadmissible to the USA due to the fact that they had HIV no longer need an HIV waiver (also known as an I-601 waiver) to overcome their inadmissibility and may now be eligible to enter the United States provided they meet other Department of State and USCIS requirements.

The United States government has a responsibility to make sure that those entering the USA are not carrying diseases that could pose a threat to the American Citizenry. To this end, Embassy staff and Civil Surgeons at overseas hospitals take their job very seriously. In Thailand, a major issue for some applicants is Tuberculosis. Some applicants are found to have or have had TB. In these situations, a battery of tests must be conducted in order to ensure that the disease has been eradicated and the applicant is no longer contagious.  For those who had TB in the past, a thorough search of the applicant’s medical records is conducted in order for the Civil Surgeon to be certain that the applicant no longer poses a threat to others. Although sometimes frustrating, the Medical Examination process is a necessary component of the due diligence conducted by the United States Embassies and US Consulates abroad.