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.
On April 1, 2013, the World
Health Organization (WHO) reported that confirmed human infection with novel
avian influenza A(H7N9) virus was identified in China. The first onset
of illness was on February 19, 2013. WHO reports 131 total confirmed cases
as of May 9, all in or with recent travel to China. Thirty-two infected
individuals have died. FDOH continues to actively monitor the situation.
There is no evidence that avian
influenza A(H7N9) virus is capable of sustained person-to-person
There is no evidence of avian
influenza A(H7N9) virus infection in the United States or any countries
other than China. No travel advisories to China are in effect.
On April 5, FDOH distributed a
CDC Avian Influenza A(H7N9) virus Health Advisory to state, county and
community health partners via EpiCom, Floridas health alert notification
More information on avian
influenza A(H7N9) virus and other novel and variant influenza viruses can be
Avian influenza A(H7N9) virus is
a kind of influenza normally found in birds. These are the first identified
cases of human infection with avian influenza A(H7N9) virus.
Sixty-six Florida counties
reported Mild or No influenza activity. One county reported Moderate
influenza activity. Thirty-two counties reported declining influenza
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 was less than 2%.
In the Panhandle and Central
Florida ILI visits decreased this week.
In Northeast and South Florida,
emergency department visits for ILI increased this week.
Florida), the most common subtypes of influenza detected this season been
influenza A H3, followed by influenza B. In the last few weeks,
influenza B is the commonly detected subtype in Florida and nationwide.
In week 19, one of ten specimens
submitted for influenza testing to BPHL tested positive for influenza. It
tested PCR positive for 2001 influenza A at BPHL. Influenza B, influenza A
H3 and 2009 influenza A H1N1 have been detected. All of these are seasonal
strains of influenza.
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 19.
Influenza Fact Sheets
Resources for County Health Departments
Additional Influenza Resources
Other Acute Respiratory