It is generally recognized today that the United States has a need to contri bute to the improvement of health throughout the world. The need stems from the interrelationships that exist between the health of Americans and the health status of the rest of the people on "Spaceship Earth." Disease does not respect national boundaries, and the frequency of travel and trade between countries increases each year. It further relates to the opportunities found in international settings to help solve health problems more effec tively and efficiently. This includes the unique human resources that are...