Note: For the 2016-2017 season, CDC recommends use of the flu shot (inactivated influenza vaccine or IIV) and the recombinant influenza vaccine (RIV). The nasal spray flu vaccine (live attenuated influenza vaccine or LAIV) should not be used during 2016-2017. The 2016-2017 influenza vaccination recommendations are now available.
While current U.S. flu activity is low overall, in the past 2 weeks CDC has received reports of a small number of localized influenza outbreaks. This is not unusual for September. It is not possible to make any predictions about the timing or severity of the upcoming influenza season based on these outbreaks.
CDC recommends a yearly flu vaccine for everyone 6 months and older. You should try to get your flu vaccine anytime between now and the end of October, if possible. Flu vaccination can reduce flu illnesses and prevent flu-related hospitalizations. Flu vaccines have been updated for the 2016-2017 season. More than 90 million doses of seasonal influenza vaccine have been distributed at this time.
Flu BasicsSymptoms, How Flu Spreads, Higher Risk Groups, Past and Current Flu Season
Prevention - Flu VaccineVaccine Safety, Vaccination Coverage, Influenza VIS, NIVW, Infection Control
TreatmentsDrugs to Treat Flu Virus, Stay Home When Sick, Caring for Someone Sick With Flu
Supply and DistributionApproved U.S. Flu Vaccines, Total Doses Distributed
News & HighlightsFlu Spotlights, Press Releases…
Health ProfessionalsVaccination, Antiviral Drugs, Infection Control, Diagnostic Testing, and Training
Free ResourcesPrintable Materials, Photos, Podcasts, Videos, PSAs, eCards, Badges & Buttons, Articles
Information For PartnersCampaign Highlights, Partner Activity, Media Briefings, Promotional/Educational Tools
Questions & AnswersAnswers to Flu-Related Questions
Public Health Image LibraryPhotographs, Illustrations, and Multimedia Files
Other Flu Web Sites
There are many different influenza A viruses; some are found in humans and others in animals such as avian flu in birds and poultry.
U.S. H5 Viruses: Highly pathogenic avian influenza (HPAI) H5 infections have been reported in U.S. birds and poultry. No human infections with these viruses have been detected at this time, however similar viruses have infected people in other countries and caused serious illness and death in some cases.
CDC’s pandemic preparedness efforts include ongoing surveillance of human and animal influenza viruses, risk assessments of influenza viruses with pandemic potential, and the development and improvement of preparedness tools that can aid public health practitioners in the event of an influenza pandemic.
Bat influenza refers to influenza A viruses found in bats. Laboratory research at CDC suggests these viruses would need to undergo significant changes to become capable of infecting and spreading easily among humans. Little yellow shouldered bats are not native to the continental United States, but are common in Central and South America.
Influenza A viruses are found in humans and many different animals, including ducks, chickens, pigs, whales, horses and seals. Additional information on 2009 H1N1 influenza, Flu.gov, and Nonpharmaceutical Interventions (NPIs).
Supply & Distribution
The latest report on CDC's international flu activities highlights the progress that has been made over the past two fiscal years in establishing, expanding and maintaining influenza surveillance and laboratory capacity in more than 50 countries around the world where CDC has provided support.
- Summary of Influenza Risk Assessment Tool (IRAT) Results Tuesday, September 13, 2016
- Prevention and Control of Seasonal Influenza with Vaccines Tuesday, August 30, 2016
- Recommendations of the Advisory Committee on Immunization Practices — 2016–17 Influenza Season Friday, August 26, 2016
- Interim Guidance for Clinicians on Human Infections with Variant Influenza Viruses Monday, August 15, 2016
- Case Count: Detected U.S. Human Infections with H3N2v by State since August 2011 Friday, August 12, 2016
- Page last reviewed: September 26, 2016
- Page last updated: September 26, 2016
- Content source:
- Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases (NCIRD)
- Page maintained by: Office of the Associate Director for Communication, Digital Media Branch, Division of Public Affairs