Influenza

Common seasonal illness requiring yearly vaccination. Orthomyxovirus causing sudden onset fever, myalgia, and respiratory symptoms.

Key facts

Did you know?

Pig respiratory tracts have receptors for both avian and human influenza, allowing them to be infected by multiple strains at once. When this happens, the viruses can undergo genetic 'reassortment,' swapping gene segments to create entirely new hybrid strains — a process behind pandemics like H1N1 in 2009.

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