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Influenza

Contact: Florida Health


State influenza and influenza-like illness (ILI) activity:

In weeks 21-22, ILI activity was relatively stable. Levels were similar to those observed at this time in past years. Influenza viruses continued to circulate at low levels.

In weeks 21-22, three respiratory outbreaks were reported. Three influenza and other respiratory disease outbreaks have been reported since May 19, 2019 (when the traditional influenza season ended).

Geographic Spread is Sporadic, the predominant strain is A(H3) and the ILI activity trend is stable

No new influenza-associated pediatric deaths were reported in weeks 21-22. Four influenza-associated pediatric deaths have been reported since the beginning of the 2018-19 season, all in unvaccinated children. Annual vaccination is the best way to protect children from influenza.

In week 21-22, seven (33.3%) of the 21 specimens submitted to the Bureau of Public Health Laboratories for influenza testing were positive for influenza: three influenza A (H3), three influenza B Victoria lineage, and one influenza B Yamagata lineage.

In recent weeks, the percent of specimens testing positive for rhinovirus remained higher than other respiratory viruses under surveillance (including influenza). For more information, see page 3.

In weeks 21-22, the percent of emergency department and urgent care center visits for ILI statewide increased slightly. Levels over the past few weeks remained stable overall and were similar to those observed at this time in previous years.

 

In weeks 21-22, the percent of emergency departments and urgent care center visits for ILI statewide increased slightly. Levels over the past few weeks remained stable overall and were similar to those observed at this time in previous seasons.

The figure above shows the percent of visits for influenza-like illness (ILI) for facilities participating in ESSENCE-FL (n=349) statewide for the current year (week 40, 2018 to week 22, 2019) and the last three years (2017-18, 2016-17, and 2015-16). The ESSENCE-FL ILI syndrome captures visits with chief complaints that include the words “influenza” or “flu,” or chief complaints that include the words “fever” and “cough,” or “fever” and “sore throat.” For more information on the use of ESSENCE-FL for influenza and ILI surveillance, see page 4.

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