The health of Americas and the health of people around the world are more closely linked than ever before. This interconnectedness offers.both opportunities and challenges. A disease outbreak in a distant country.can threaten the health of Americans at home,just as a discovery made in a foreign country can lead to better treatment for disease affecting Americans.Greater movement of people and of products- including fords,feed,drugs, and medical devices-can increase exposure to potential health risks originating outside the United States. But this mobility can also make life-saving care more readily available for all. Scientific advances in medicine,health care delivery and public health are increasingly built on international collaboration among leading researchers,from which all benefit regardless of nationality.