What vaccines are required to travel internationally?
Here is a list of possible vaccines that you may need to get for the first time or boosters before you travel.
COVID-19.
Chickenpox.
Cholera.
Flu (Influenza)
Hepatitis A.
Hepatitis B.
Japanese encephalitis.
MMR (Measles, Mumps, Rubella)
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Some countries don't allow unvaccinated travelers to enter, period. For example, travel to the majority of European countries is possible only to those who are vaccinated. If you're not vaccinated, make sure the country you want to visit will allow you entry.
It is recommended that medication be clearly labeled to facilitate the screening process. You may bring medically necessary liquids, medications and creams in excess of 3.4 ounces or 100 milliliters in your carry-on bag. Remove them from your carry-on bag to be screened separately from the rest of your belongings.
In mid-to-late 2023, U.S. citizens and nationals of over 60 other countries will need an electronic travel authorization to visit much of Europe. Travelers to any Schengen-zone country will have to register with a European Travel Information and Authorization System (ETIAS).