Flu activity is high across most of the country with flu illnesses, hospitalizations and deaths elevated. Flu season will probably continue for several weeks.
While the flu vaccine is not working as well as usual against some H3N2 viruses, vaccination can still protect some people and reduce hospitalizations and deaths, and will protect against other flu viruses.
Influenza antiviral drugs can treat flu illness. CDC recommends these drugs be used to treat people who are very sick or who are at high risk of serious flu complications who have flu symptoms. Early antiviral treatment works best.
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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.
H7N9: Human infections with a new avian influenza A (H7N9) virus were first reported in China in March 2013. CDC has been following this situation closely and is coordinating with domestic and international partners.
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).
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.
Supply & Distribution
- Interim Guidance on Testing, Specimen Collection, and Processing for Patients with Novel Influenza A Friday, January 30, 2015
- Interim Guidance on Influenza Antiviral Chemoprophylaxis of Persons Exposed to Birds with Avian Flu Friday, January 30, 2015
- FluView - Weekly Influenza Surveillance Report Friday, January 30, 2015
- Antiviral Letter to Providers Thursday, January 29, 2015
- National Influenza Vaccination Week (NIVW) 2015 dates posted! Thursday, January 29, 2015
- Page last reviewed: January 30, 2015
- Page last updated: January 30, 2015
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