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Varicella (Chickenpox) in Florida

Florida Health

Disease Control

May Key Points

45 Cases
No new
<1 year olds had
highest incidence rate
78% cases not
up-to-date or
unknown vaccinations status

The number of varicella cases reported in May 2022 decreased 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 May 2022, 45 cases of varicella were reported, which is below the previous 5-year average.

In May 2022, 45 varicella cases were reported in 21 counties, outlined in black in the map. From March 2022 through May 2022 the average county rates varied throughout the state.

A map showing the previous 3-month average varicella rates per 100,000 population. Counties with one or more cases reported in May are   Broward Collier Miami-Dade Duval Hillsborough Jackson Lake Lee Marion Nassau Okaloosa Orange Osceola Pasco Pinellas Putnam St. Johns St. Lucie Seminole    Counties with a rate of 0.08-0.19 per 100,000 population are:   Manatee St. Lucie Escambia Miami-Dade Orange Palm Beach Okaloosa Hernando Pasco Polk Bay       Counties with a rate of 0.2-0.71 per 100,000 population are:    Sumter Broward Duval Pinellas Volusia Collier Hillsborough Lee Lake Nassau Sarasota Indian River Osceola Seminole Monroe Putnam St. Johns Citrus Marion    Counties with a rate of 0.72-1.43 per 100,000 population are:   Wakulla Jackson.

In 2022, 191 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; 984 in 2019; 345 in 2020; 380 in 2021 and 191 in 2022.

In May, the varicella rate was highest among infants <1 year old at 1.7 cases per 100,000 population, which is consistent with previous months. 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 May, 2 cases were transmitted within households 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 82% of cases reporting unknown setting in May.

People with shingles infection can transmit the virus that causes varicella to people without immunity. In May, 4 cases reported having contact with someone diagnosed with shingles during their exposure period.

1.   A graph showing a bar graph of total cases compared to household associated cases and outbreak associated cases for May 2022 and the previous 3-month average. In May 2022, 2 household-associated cases were identified.

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