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Applicants for immigration into the United States must meet certain medical standards, as assessed by the Report of Medical Examination and Vaccination Record (I-693). The purpose of the medical exam is to ensure that an applicant is “not inadmissible to the United States on public health grounds."
As of 22 October 2023, all foreign travelers whose passport of citizenship require a visa to enter Mexico; must obtain a transit visa from a Mexican diplomatic mission prior to boarding a flight to Mexico, regardless if the traveler will not be entering Mexico. Exceptions are for those foreign nationals who: [27]
Vaccination requirements for international travel are the aspect of vaccination policy that concerns the movement of people across borders. Countries around the world require travellers departing to other countries, or arriving from other countries, to be vaccinated against certain infectious diseases in order to prevent epidemics .
While most foreign nationals will need to show proof of full vaccination before boarding a flight to visit the U.S., there are some exceptions.
There are excellent free tools to help you know whether you need a visa to travel or if you need any vaccinations or preventive medical treatment.
A U.S. visa does not authorize entry into the United States or a stay in a particular status, but only serves as a preliminary permission to travel to the United States and to seek admission at a port of entry. The final admission to the United States is made at the port of entry by a U.S. Customs and Border Protection (CBP) officer.
While most foreign nationals will need to show proof of full vaccination before boarding a flight to visit the U.S., ... 800-290-4726 more ways to reach us. Sign in. Mail. 24/7 Help.
Visa requirements for United States citizens are administrative entry restrictions by the authorities of other states that are imposed on citizens of the United States. As of 2025, holders of a United States passport may travel to 186 countries and territories without a travel visa , or with a visa on arrival .