ACT welcomes attendees from around the globe to this scientific meeting. This is a reminder to international travelers to apply for your visa early—three to four months before the travel date—as it can take some time for a response. is the official source for visa information for the United States. Contact ACT Headquarters to request a letter of invitation, if needed for travel approval.

If you have any problems regarding your visa applications, please report your case to the International Visitors Office of the National Academies by completing their online questionnaire. To help them identify your case, please include the name of our meeting (the American College of Toxicology 42nd Annual Meeting) in the “Purpose of Visit” field on the questionnaire. The International Visitors Office can submit inquiries to the US Department of State about the status of visa applications that have been pending for 21 days or more. If you have any questions, please contact