International Travelers

Visas and other documents

You are responsible for all travel arrangements, including procurement of visas, if necessary, and acquisition of currency sufficient for your stay. A formal letter of invitation for the 2022 meeting to help acquire visas or funding is available. Please fill out this google form to request a visa letter or certificate of attendance.

The ESTA application now requires the traveler’s country of birth information. This applies to new applications submitted on or after Dec. 22, 2011, and does not apply to applications submitted prior to that date.

For those HPS 2022 participants traveling from a foreign country, please be advised that the U.S. requires a visa for most international travelers, except travelers from Canada and countries participating in the Visa Waiver Program. To obtain the visa electronically, go to

From the ESTA welcome page:
International travelers who are seeking to travel to the United States under the Visa Waiver Program are now subject to enhanced security requirements. All eligible travelers who wish to travel to the U.S. under the Visa Waiver Program must apply for authorization and pay the fee.

The application process is explained on the ESTA website listed above. Voluntary ESTA applications may be submitted at any time prior to travel to the United States, and Visa Waiver Program travelers are encouraged to apply for authorization as soon as they begin to plan a trip to the United States.

There are currently 38 countries participating in the Visa Waiver Program.
To apply for a visa visit