- Since November 2003, over 400 cases of human infection with highly pathogenic H5N1 (Bird) flu viruses have been reported by more than a dozen countries in Asia, Africa, the Pacific, Europe and the Near East. Indonesia and Vietnam have reported the highest number of H5N1 (Bird) flu cases to date.
- Overall mortality in reported H5N1(Bird) flu cases is approximately 60%. The majority of cases have occurred among children and adults aged less than 40 years old. There have been very few cases of human-to-human transmission. Flu recipients in such cases have all died and there was no further spread.
- Highly pathogenic H5N1 (Bird) flu viruses have never been detected among birds or people in the United States.
More information on the global reach of H5N1 (Bird) flu:
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