Related terms:
contaminated surfaces
antigenic drift
pandemic influenza
viral envelope
viral genome
hong kong flu
pandemic strain
reassortment
influenza a virus subtype
influenza pandemic
influenza viruses
hpai
influenza vaccine
influenzavirus
spanish flu
neuraminidase
hemagglutinin
influenza virus
virion
Wikipedia sources:
Antigenic shift
Influenza
Influenza pandemic
Virus
Context for words:
antigenic
shift
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