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RestoredCDC URL: http://restoredcdc.org/www.cdc.gov/pandemic-flu/basics/index.html
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Original site: www.cdc.gov/pandemic-flu/basics/index.html | RestoredCDC.org is an independent project, not affiliated with CDC or any federal entity. Visit CDC.gov for free official information. Due to archival on January 6, 2025, recent outbreak data is unavailable. Videos are not restored. Access data.restoredcdc.org for restored data. Use of this site implies acceptance of this disclaimer.[More]About Us Report Bug Compare ContentSkip directly to site content Skip directly to searchAn official website of the United States governmentHere's how you knowOfficial websites use .govA .gov website belongs to an official government organization in the United States.Secure .gov websites use HTTPSA lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.Pandemic FluExplore TopicsSearchSearchClear InputFor Everyone* About Pandemic Flu* View allHealth Care Providers* Healthcare System Preparedness and Response* View allPublic Health* National Pandemic Strategy* Monitoring for Influenza Viruses* Interim Updated Planning Guidance* Federal Resources for Planning* View allRelated Topics:Seasonal Flu | Avian Flu | Swine Flu | Flu in Animals | Flu Vaccines Work | Flu ForecastingView Allsearch close searchsearchPandemic Flu Menu ClosePandemic Flu MenusearchFor Everyone* About Pandemic Flu* View All HomeHealth Care Providers* Healthcare System Preparedness and Response* View AllPublic Health* National Pandemic Strategy* Monitoring for Influenza Viruses* Interim Updated Planning Guidance* Federal Resources for Planning* View AllRelated Topics* Seasonal Flu* Avian Flu* Swine Flu* Flu in Animals* Flu Vaccines Work* Flu ForecastingView All Pandemic FluMarch 27, 2024About Pandemic InfluenzaPurpose* An influenza pandemic is a global outbreak of a new influenza A virus that is very different from current and recently circulating human seasonal influenza A viruses.* Pandemics happen when new (novel) influenza A viruses emerge which are able to infect people easily and spread from person to person in an efficient and sustained way.Pandemic BasicsBecause the virus is new to humans, very few people will have immunity against the pandemic virus, and a vaccine might not be widely available. The new virus will make a lot of people sick. How sick people get will depend on the characteristics of the virus, whether or not people have any immunity to that virus, and the health and age of the person being infected. With seasonal flu, for example, certain chronic health conditions are known to make those people more susceptible to serious flu infections. The risk factors associated with seasonal flu can be found at "People at High Risk of Developing Flu–Related Complications." Influenza pandemics are uncommon; only occurred during the 20th century.Seasonal FluPandemic FluHow often does it happen?Happens annually and usually peaks between December and FebruaryRarely happens (three times in 20th century)Will most people be immune?Usually some immunity from previous exposures and influenza vaccinationMost people have little or no immunity because they have no previous exposure to the virus or similar virusesWho is at risk for complications?Certain people are at high-risk for serious complications (infants, elderly, pregnant women, extreme obesity and persons with certain chronic medical conditions)Healthy people also may be at high risk for serious complicationsWhere can I get medical care?Health care providers and hospitals can usually meet public and patient needsHealth care providers and hospitals may be overwhelmedAlternate care sites may be available to meet public and patient needsWill a vaccine be available?Vaccine available for annual flu seasonUsually, one dose of vaccine is needed for most peopleAlthough the US government maintains a limited stockpile of pandemic vaccine, vaccine may not be available in the early stages of a pandemicTwo doses of vaccine may be neededWill antivirals be available?Adequate supplies of antivirals are usually availableAntiviral supply may not be adequate to meet demandHow many people could get sick and suffer complications?Rates of medical visits, complications, hospitalizations and death can vary from low to highCDC estimates that flu-related hospitalizations since 2010 ranged from 140,000 to 710,000, while flu-related deaths are estimated to have ranged from 12,000 to 56,000.Rates of medical visits, complications, hospitalizations and death can range from moderate to highNumber of deaths could be much higher than seasonal flu (e.g. The estimated U.S. death toll during the 1918 pandemic was approximately 675,000)What impact will it have on schools and workplaces?Usually causes minor impact on the general public, some schools may close and sick people are encouraged to stay homeManageable impact on domestic and world economiesMay cause major impact on the general public, such as travel restrictions and school or business closingsPotential for severe impact on domestic and world economiesDownloadRelated PagesView AllBack to Top* What CDC Is Doing* What CDC Does About Novel Flu: Outbreak InvestigationsView All Pandemic FluWhat CDC Is DoingMarch 27, 2024Sources Print ShareFacebook LinkedIn Twitter SyndicateContent Source:National Center for Immunization and Respiratory Diseases (NCIRD)Related PagesView All* What CDC Is Doing* What CDC Does About Novel Flu: Outbreak InvestigationsView All Pandemic FluBack to TopPandemic FluA flu pandemic is a global outbreak of a new flu A virus. Flu pandemics happen when a new (novel) flu A virus emerges that is able to infect people easily and spread from person to person in an efficient and sustained way, and to which most of the world’s population do not have immunity.A flu pandemic is a global outbreak of an influenza A virus against which most people lack immunity.View AllFor Everyone* About Pandemic FluHealth Care Providers* Healthcare System Preparedness and ResponsePublic Health* National Pandemic Strategy* Monitoring for Influenza Viruses* Interim Updated Planning Guidance* View AllSign up for Email UpdatesContact UsContact Us* Call 800-232-4636* Contact CDCAbout CDCAbout CDC* Pressroom* Organization* Budget & Funding* Careers & JobsPolicies* Accessibility* External Links* Privacy* Web Policies* FOIA* OIG* No Fear Act* Nondiscrimination* Vulnerability Disclosure PolicyLanguagesLanguages* EspañolLanguage Assistance* Español* 繁體中文* Tiếng Việt* 한국어* Tagalog* Русский* العربية* Kreyòl Ayisyen* Français* Polski* Português* Italiano* Deutsch* 日本語* فارسی* EnglishArchive* CDC Archive* Public Health PublicationsContact UsContact Us* Call 800-232-4636* Contact CDCAbout CDC* Pressroom* Organization* Budget & Funding* Careers & Jobs* About CDCPolicies* Accessibility* External Links* Privacy* Web Policies* FOIA* OIG* No Fear Act* Nondiscrimination* Vulnerability Disclosure PolicyLanguagesLanguages* EspañolLanguage Assistance* Español* 繁體中文* Tiếng Việt* 한국어* Tagalog* Русский* العربية* Kreyòl Ayisyen* Français* Polski* Português* Italiano* Deutsch* 日本語* فارسی* EnglishArchive* CDC Archive* Public Health PublicationsHHS.gov USA.gov
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