The survey study population was taken from PHP who work at a large U.S. public health agency that has locations in several U.S. cities. PHP were defined as employees of the agency who were traveling to take part in public health activities as part of their work. Employees engaging in work-related travel are offered pre-travel care at one of 3 occupational health (OH) clinics. The employees’ agency recommends that international travelers visit one of the clinics at least 1 month prior to their trips. The cost of the appointments is paid by the employer, as are the costs of travel-related vaccines and medications, including a travel health kit provided to all international travelers. During the study period from September 1, 2009, to September 30, 2010, 1742 PHP from this agency sought counsel from one of the clinics and were asked during their visit whether they would be willing to participate in an anonymous survey. Those who agreed were provided a pre-travel survey form and a written consent statement for the pre-travel and post travel surveys. The completed surveys and consents were sealed in provided envelopes. Participants who chose to participate in the post-travel survey were sent an e-mail after their return that allowed them to access a password protected secure website to complete the questionnaire online. To ensure anonymity, no identifying information was included on survey forms. Surveys were coded with a survey identification number to allow pre- and post-travel surveys to be linked. This study was reviewed and approved by the ethics review board of the participating institution.