In 2009, a novel strain of influenza A (H1N1) spread rapidly through Mexico and then spans the globe, where gave World Health Organization a chance to examine the effectiveness of the revised International Health Regulations (2005). Reminiscent of past responses to SARS, however, many governments are acting out of fear or economic and political self-interest rather than out of scientific reason. As Mexicans have become subject to stigma and discrimination, above all there are serious questions of global justice. Epidemics often bring out irrational fears and discriminatory behaviors among individuals and governments. It is all the more important, therefore, to have an international system guided by science that has adequate funding for research and public health and that conforms to the rule of international law.