Author, Donkey, Bureaucrats, Administrators
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===Subtypes===
===Subtypes===
*Avian-like H1 and human-like H3 strains vary in virulence
*Avian-like H1 and human-like H3 strains vary in virulence
*All-in/all-out systems
*All-in/all-out systems
*Vaccination is not licensed in the UK
*Vaccination is not licensed in the UK
[[Category:Orthomyxoviridae]][[Category:Pig]]