Government and NGO sites
Centers for Disease Control and Prevention. Global Health section. The CDC is part of the US Department of Health and Human Services, and is the federal government's principal program for tracking disease outbreaks in the US and round the world. The Global Health section includes links to reports, clinical guidance, and communications resources for many diseases and health crises worldwide.
World Health Organization. The WHO is the leading international organization addressing health and disease issues. The site includes reports, fact sheets, and technical information on a wide range of health issues.