Why have there been two apparent exclusions?
Why have there been two apparent exclusions (H1N1 →H2N2 and H2N2 →H3N2)?
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Controlling Infectious Diseases »Controlling Infectious Diseases
Diseases »Diseases
Influenza »Influenza
Outstanding questions in 2002 »Outstanding questions in 2002
What are the mechanisms of interaction between subtypes? »What are the mechanisms of interaction between subtypes?
Why have there been two apparent exclusions?
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