Updated December 2, 2021.
Please note: All participants at the in-person conference—presenters, attendees, exhibitors, staff members, guests, and vendors—will be required to be fully vaccinated (as defined by the CDC) at least 14 days prior to the start of the meeting. You will be asked for proof of vaccination. Proof of vaccination is your vaccination card (photo is acceptable) from the healthcare provider. Further policies can be found on the Conference Policies page. Before booking your travel to the US, please visit the US State Department’s website for the most up-to-date information.
As of November 8, 2021, the United States has reopened to fully vaccinated international travelers from most countries. GSA advises scientists traveling to the US to stay up-to-date on the latest international travel requirements.
Effective November 8, 2021, all non-immigrant, non-citizen air travelers (with limited exceptions) are required to be fully vaccinated and to provide proof of vaccination prior to boarding a flight to the United States.
COVID-19 testing requirements
All travelers ages 2 and up, regardless of nationality, must be tested for COVID-19 prior to boarding a flight to the United States. Travelers who are fully vaccinated (including US citizens and permanent residents) must provide proof of a negative COVID-19 test or proof of recovery from a COVID-19 infection three days prior to their flight. Travelers who are not fully vaccinated (including US citizens and permanent residents) must provide proof of a negative COVID-19 test or proof of recovery from a COVID-19 infection one day prior to their flight.
Travelers prohibited from entering the US
A Presidential Proclamation issued on November 27, 2021 prohibits some travelers from entering the United States regardless of their vaccination status. With specific exceptions, travelers who were physically present within certain Southern African countries (as listed on the CDC’s website) during the 14-day period preceding their entry or attempted entry are not permitted to enter the US. Please refer to the Proclamation for the full list of exceptions, including those for United States citizens.
We advise scientists traveling to the US to apply for a visa as early as possible; at least six months before the visa is needed. Please check with your local US consulate or embassy to find out the earliest that you may apply for a visa.
All visitors traveling to the US (including from Visa Waiver Program countries) must register their details online at least three days in advance of travel. The Department of Homeland Security (DHS) Electronic System for Travel Authorization (ESTA) is a free, automated system used to determine the eligibility of visitors to travel to the United States. It collects the same information as the paper I-94W form you usually complete when traveling to the United States. ESTA applications may be submitted at any time prior to travel, provided it is three days in advance of travel. An ESTA authorization generally will be valid for up to two years. DHS recommends that travelers submit an ESTA application as soon as they begin travel plans.
If you are NOT eligible to travel under the Visa Waiver Program you will need to:
If you are experiencing significant visa delays, we encourage you to fill out the National Academies visa survey. This allows them to bring your case to the attention of the US Department of State and to track trends in visa issues among the scientific community.
Visa questions should be directed to the National Academies International Visitors Office: firstname.lastname@example.org.
Customized letters of invitation will be available to those who have registered for the meeting or submitted an abstract. A link to request your letter of invitation will be provided in your confirmation. For security purposes, letters of invitation can only be sent to individuals that have registered or submitted an abstract for the meeting.