Avian influenza in humans 

• European Commission | DG Health and Consumers: Avian Influenza
• World Health Organisation (WHO): Avian influenza
• Centres for Disease Control and Prevention (CDC): Avian Influenza (Bird Flu)
• UN System Coordinator for Avian and Human Influenza (UNSIC): Avian Influenza and the Pandemic Threat

Avian influenza in animals:

• World Organisation for Animal Health (OIE): Avian Influenza 
• Food and Agriculture Organisation (FAO): Avian Influenza

Maps of affected areas:

• Food and Agriculture Organization of the United Nations (FAO) - Outbreak maps