Avian Influenza

The H5N1 Strain

A number of countries have reported cases of avian influenza, commonly referred to as “bird flu” in their domestic and wild bird populations.  The H5N1 strain of avian influenza causes severe disease in domesticated fowl.  In addition, there continues to be a number of  confirmed cases of bird-to-human transmissions of avian influenza, many of which have resulted in death. 

The vast majority of the known human cases have resulted from direct contact with poultry, and there is only limited evidence to suggest possible human-to-human transmission.  However, the Centers for Disease Control and Prevention (CDC), the World Health Organization, and the U.S. Department of State are nonetheless concerned about the potential for human-to-human transmission of this highly dangerous flu strain, and are working closely with other partners in an effort to monitor the outbreak.

Concerns about the possibility of an avian influenza pandemic have prompted international and national efforts to institute pandemic preparedness measures.  American citizens traveling to or living in countries where avian influenza is prevalent should consider the potential risks and keep informed of the latest medical guidance and information in order to make appropriate plans.

Additional Avian Influenza Resources

For complete information about Avian Influenza, please visit:

• U.S. Department of State's Avian Flu Fact Sheet

For the most up-to-date information on the countries affected and the number of deaths:

• World Health Organization (WHO) - Confirmed Cases of Avian Flu

For preventative measures and travel information related to Avian Flu:

• U.S. Center for Disease Control (CDC) Avian Flu Website

• World Health Organization (WHO) Avian Flu Website

For information on the U.S. Government's overall response and efforts to combat Avian Flu:

• U.S. Government's Pandemic Flu Website