Respiratory Disease Surveillance
For more information about
Novel Influenza A (H7N9) can be found at
Influenza, or flu, is a respiratory infection caused by a variety of flu
viruses. The "flu" is a common catch-all term used for a variety of illnesses,
but it correctly applies only to the upper respiratory disease caused by the
Estimates are that between 15% and 40% of the population will develop illness
from influenza every year. An average of about 36,000 people per year in the
United States die from influenza, and 114,000 per year have to be admitted to
the hospital as a result of influenza infection. Anyone can get the flu (even
healthy people), and serious problems from influenza can happen at any age.
People age 65 years and older, people of any age with chronic medical
conditions, and very young children are more likely to get complications from
For the most current information about
influenza in Florida, please see Florida's weekly surveillance report, the Flu
Review, included below under Influenza Surveillance.
Emergency department and
urgent care center influenza-like illness (ILI) visits have decreased
overall in recent weeks. In emergency departments and urgent care
centers reporting to ESSENCE-FL, the statewide percent of emergency
department visits for ILI is at typical levels for this time of year in all
regions of Florida.
Florida), the most common subtypes of influenza detected this season been
influenza A H3, followed by influenza B.
In week 22, one of eight
specimens submitted for influenza testing at BPHL tested PCR positive for
2009 influenza A H1N1.Influenza B, influenza A H3 and 2009 influenza A H1N1
have all been detected since October 2012. All of these are seasonal strains
Nationally (including Florida),
almost all circulating influenza is a good match for the vaccine.
No influenza or ILI outbreaks
(epidemiologically linked cases of influenza in a single setting) were
reported in week 22. In week 21, one outbreak in a Miami-Dade healthcare
facility was reported.
influenza-associated death was reported in an unvaccinated Miami-Dade County
resident with underlying health conditions in week 21.
The preliminary estimated
number of Florida to pneumonia or influenza in week 21 is lower than the
seasonal baseline, based on previous years data. Estimated deaths due
to pneumonia and influenza are identified using preliminary death
Influenza Fact Sheets
Resources for County Health Departments
Additional Influenza Resources
Other Acute Respiratory