The most recent FluView report shows increasing flu activity in the United States. Further increases in activity are expected in the coming weeks. Flu activity most often peaks in February and can last into May. It is not too late to get your flu vaccine this season. Flu vaccines this season have been updated to better match circulating viruses and most circulating viruses so far are still like the recommended vaccine viruses for this season.
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, as well as prevent flu-related hospitalizations. More than 146.0 million doses of flu vaccine have been distributed in the United States. It takes about two weeks after vaccination for protection to set in, making now the perfect time to get vaccinated. Find a Vaccine.
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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.
There are many different influenza A viruses; some are found in humans and others in animals such as swine flu in pigs.
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.
Dog flu is a contagious respiratory disease in dogs caused by a specific Type A influenza virus referred to as a “canine influenza virus.” This is a disease of dogs, not of humans.
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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Flu Activity & Surveillance
International Flu
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.
What's New
- Situation Update: Summary of Weekly FluView Report Friday, February 05, 2016
- FluView - Weekly Influenza Surveillance Report Friday, February 05, 2016
- For Pregnant Women with Flu, the Earlier the Better for Antiviral Treatment Thursday, February 04, 2016
- UPDATE: Total doses of flu vaccine distributed for 2015-16 season Thursday, February 04, 2016
- Treating Flu: CDC 2015-2016 Influenza Antiviral Recommendations Tuesday, February 02, 2016
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- Page last reviewed: February 5, 2016
- Page last updated: February 5, 2016
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