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Varicella (Chickenpox) in Florida

Florida Health

Disease Control

October Key Points

30 Cases
No new
<1-5 year olds had
highest incidence rate
73% cases not
up-to-date or
unknown vaccinations status

The number of varicella cases reported in October 2022 increased from the previous month and was below the previous 5-year average. Due to robust vaccination programs, there is no longer discernable seasonality for varicella cases.

A graph showing a summary of varicella cases reported by month in 2021 as compared to the previous 5-year average. In October 2022, 30 cases of varicella were reported, which is below the previous 5-year average.

In October 2022, 30 varicella cases were reported in 16 counties, outlined in black in the map. From August 2022 through October 2022 the average county rates varied throughout the state.

1.  A map showing the previous 3-month average varicella rates per 100,000 population. Counties with one or more cases reported in October are   Alachua Brevard Broward Miami-Dade Duval Hernando Highlands Hillsborough Lee Manatee Palm Beach Pasco Pinellas Polk St. Johns St. Lucie      Counties with a rate of 0.07-0.12 per 100,000 population are:   Seminole Manatee Osceola Collier Broward Miami-Dade Palm Beach Orange     Counties with a rate of 0.13-0.43 per 100,000 population are:    Volusia Lee Duval Polk Brevard Hernando Hillsborough Lake Marion Pinellas Indian River Pasco Alachua Escambia Highlands St. Johns Martin     Counties with a rate of 0.44-0.96 per 100,000 population are:   Monroe St. Lucie Wakulla

In 2022, 353 varicella cases were reported. The annual number of reported varicella cases increased from 2017 to 2019 and decreased significantly in 2020 and 2021.

A graph showing a summary of the total number of varicella cases reported by year with an emphasis on 2019. In total for each year there have been: 656 in 2017; 853 in 2018; 983 in 2019; 348 in 2020; 365 in 2021 and 353 in 2022.

In October, the varicella rate was highest among 1-5 year olds at 0.94 cases per 100,000 population. Infants <1 year old are too young to receive varicella vaccination, which is why vaccination of siblings, parents, grandparents and other age groups is important in infection prevention among infants.

In October, 2 cases were household-associated and no cases were outbreak-associated. For most varicella cases, exposure to other known cases is not identified. In Florida, transmission setting is not routinely identified for non-outbreak cases, resulting in 69% of cases reporting unknown setting in October.

People with shingles infection can transmit the virus that causes varicella to people without immunity. In October, 5 cases reported having contact with someone diagnosed with shingles during their exposure period.

A graph showing a bar graph of total cases compared to household associated cases and outbreak associated cases for October 2022 and the previous 3-month average. In October 2022, 2 household-associated cases and no outbreak-associated cases were identified out of a total of 30 cases.

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