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Event
2009 H1N1 Influenza Pandemic
In 2009, an outbreak of H1N1 influenza spread globally across multiple continents, illustrating the potential for modern viral epidemics to transmit rapidly over large geographic areas.
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Updated 2026-06-02
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Ch.6 Acellular Pathogens - Microbiology @ OpenStax
Microbiology @ OpenStax