This Binational Health Week fact sheet describes the demographics and basic health status of the nine million Mexican immigrants living in the U.S. It is based on published data and original analyses of the 2000 National Health Interview Survey. Held simultaneously with Mexico's National Health Week, Binational Health Week (BHW) takes place annually in selected regions of the United States and in Mexican states with high rates of international migration. The California-Mexico Health Initiative in the UC-Office of the President coordinates many of the activities that involve community members, community organizations, universities, and public officials.