If you are just a visitor in the US, you specifically do not require vaccination, however, it depends on the vaccination assessments conducted by panel physicians overseas. If you are applying for an immigrant visa or seeking to settle as a permanent resident in the United States then under the immigration laws of the United States, a foreign national is required to receive vaccinations to prevent the following diseases:
Mumps
Measles
Rubella
Polio
Tetanus and Diphtheria Toxoids
Pertussis
Haemophilus influenzae type B
Hepatitis B
Any other vaccine-preventable diseases recommended by the Advisory Committee for Immunization Practices