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Pertussis (Whooping Cough)

Contact: Florida Health

April Key Points

29 Cases
0 outbreaks
Average of 4
contacts per case
<1 year olds had
highest incidence
62% cases not up-to-date
or unknown vaccination status
This image contains a summary of pertussis cases reported by month in 2019 as compared to the previous 5-year average. In April 2019, 29 cases of pertussis were reported, which is below the previous 5-year average.

The number of pertussis cases reported in April increased from the previous month and was below the previous 5-year average. In general, more pertussis cases are reported during the summer months.

This map shows the previous 3-month average pertussis rates per 100,000 population. Counties with one or more cases reported in April are: Brevard, Miami-Dade, Escambia, Hillsborough, Lee, Manatee, Marion, Osceola, Palm Beach, Pasco, Pinellas, Polk, Santa Rosa, Sarasota, Sumter, Volusia  Counties with a rate of 0.1 per 100,000 population are: Broward, Miami-Dade, Lee, Orange, Osceola, Pinellas, Seminole  Counties with a rate of 0.2-0.3 per 100,000 population are: Brevard, Escambia, Hillsborough, Lake, Marion, Palm Beach, Pasco, Polk, Santa Rosa, Sarasota, Sumter  Counties with a rate of 0.4-0.6 per 100,000 population are: Clay, Leon, Manatee, Volusia

The 29 pertussis cases in April were reported among the 16 counties outlined in black. From February through April 2019 the average county rate has varied throughout the state.

This image contains a summary of the total number of pertussis cases reported from 2013 through 2019. In total for each year there have been: 713 in 2014; 341 in 2015; 335 in 2016; 358 in 2017; 326 in 2018; and 108 in 2019.

From January 1, 2019 through April 30, 2019, 108 pertussis cases were reported in 26 counties.

Since 2015, the number of pertussis cases reported annually remained stable. Pertussis is cyclic in nature, with peaks in disease every 3-5 years. Pertussis cases last peaked between 2013 and 2014. Case counts in April 2019 are similar to those seen in April of previous years, as noted by the white bar in the figure.

This image contains a bar graph of total cases compared to household associated cases and outbreak associated cases for April 2019 and the previous 3-month average.

In April, 4 (14%) of 29 total pertussis cases were associated with transmission within households and no cases were outbreak-associated. For most pertussis cases, exposure to other known cases is never identified, and they are not able to be linked to outbreaks.

No pertussis outbreaks were reported in April.

So far in 2019, a total of four pertussis outbreaks have been reported in school settings.

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