The most recent FluView report shows that flu activity continues to decrease in the United States. While flu activity has peaked nationally for this season, some parts of the country are still experiencing widespread flu. Ongoing activity is expected to continue for a number of weeks. Also, flu viruses circulate at low levels during the summer.
CDC recommends a yearly flu vaccine for everyone 6 months and older. Vaccination can reduce flu illnesses, doctors' visits, and missed work and school due to flu illness, as well as prevent flu-related hospitalizations.
CDC also recommends that patients suspected of having influenza who are at high risk of flu complications or who are very sick with flu-like illness should receive prompt treatment with influenza antiviral drugs without waiting for confirmatory testing.
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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.
Influenza viruses that normally circulate in pigs are called “variant” viruses when they are found in people. Influenza A H3N2 variant viruses (also known as “H3N2v” viruses) with the matrix (M) gene from the 2009 H1N1 pandemic virus were first detected in people in July 2011.
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).
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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.
- Avian Influenza Transmission Infographic Wednesday, May 25, 2016
- FluView - Weekly Influenza Surveillance Report Friday, May 20, 2016
- Situation Update: Summary of Weekly FluView Report Friday, May 20, 2016
- New CDC Vaccine Effectiveness Study Uses Innovative Approach to Measure Vaccine Benefits Tuesday, May 10, 2016
- CDC Collaborative Study: Influenza Seasonality in the Tropics and Sub-tropics Wednesday, April 27, 2016
- Page last reviewed: May 20, 2016
- Page last updated: May 20, 2016
- Content source:
- Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases (NCIRD)
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