What changes are needed for H5N1 to become a pandemic virus?
What is the significance of limited human-to-human transmission?
What are the most important warning signals that a pandemic is about to start?
Avian influenza, or "bird flu", is a ...
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What is the significance of limited human-to-human transmission?
What are the most important warning signals that a pandemic is about to start?
Avian influenza, or "bird flu", is a ...
More Information