pandemic flu
Worldwide influenza outbreak
Pandemic flu is influenza that spreads across multiple countries or continents, affecting a significant portion of the world's population.
Unlike seasonal flu, which recurs annually with familiar strains, pandemic flu involves a novel virus against which most people lack immunity: The 1918 pandemic flu killed tens of millions worldwide.
Health officials monitor for pandemic flu potential when new strains emerge.
- outbreakSudden eruption of trouble
- virusMicroscopic infectious agent
- contagionDisease spread by contact
- quarantineIsolation preventing disease transmission
- social distancingDeliberate interpersonal spacing
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- infectious diseasescholera, anthrax, malaria, measles, flu
- Fluflu, flu shot, flu vaccine, flu season, flu symptoms
- flu virusesflu, H1N1, H3N2, H5N1, seasonal flu
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