Since the 1970s, Travel Health Alert Notices (T-HANs) have been used by the Centers for Disease Control and Prevention (CDC) to provide health alerts to international travelers arriving at U.S. ports of entry. More recently, T-HANs have been distributed to travelers arriving from countries where outbreaks have occurred. T-HANs urge travelers to assess personal risk, monitor for symptoms, and seek health care if symptoms arise. The effectiveness of such communication is difficult to evaluate. Efforts to assess the effectiveness of T-HANs have ranged from formative evaluation through focus groups with international travelers and physicians who might see patients with recent international travel history to outcome research through a cross-sectional survey of travelers arriving from Haiti during the cholera outbreak. A review of T-HAN evaluation methods, challenges and successes, and lessons learned will be presented, and ideas for methods and collaboration will be sought. #2011Conference #InternationalandCross-CulturalEval #travel #HealthEvaluation #Communication #international