Factors
Entities
British Association for Immediate CareGetty ImagesEpidemiologyInfluenza A virus subtype H2N2NitrogenInfluenza A virus subtype H3N2WoodstockHerd immunity18 MonthsClevelandSmallpoxInfluenza pandemicBubonic plagueRadarFlu seasonAntibioticUniversity of WashingtonSocial distancingImmune systemHarvard UniversityInfluenzaCenters for Disease Control and PreventionPandemicVaccineUnited StatesJ. Wellington WimpyTemperate climateThe ArgumentExtreme MeasuresZenNorthern Hemisphere

