Varicella (Chickenpox) Data
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Varicella Incidence Case Maps by Year
2019 2018 2016 2015 2014 2013 2012 2011 2010
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Varicella Case Counts and Incidence Rates in Texas 2010-2019 (PDF)
Varicella Case Counts and Incidence Rates for the Most Populous Texas Counties 2018-2019 (PDF)
Varicella Cases and Incidence Rates in Texas by County 2006-2017 (PDF)
| Varicella (Chickenpox) Reported Cases and Incidence Ratesa in Texas, 2011-2020 | ||
| Year | Case Count | Incidence Rate |
| 2020 | 348 | 1.2 |
| 2019 | 1,291 | 4.4 |
| 2018 | 972 | 3.3 |
| 2017 | 1,146 | 4.0 |
| 2016 | 1,341 | 4.7 |
| 2015 | 1,491 | 5.4 |
| 2014 | 1,647 | 6.0 |
| 2013 | 1,874 | 7.0 |
| 2012 | 2,410 | 9.1 |
| 2011 | 2,558 | 9.9 |
| aIncidence rates (IR) are calculated per 100,000 population. | ||
| Population data are projected census data from Texas Demographic Center’s Texas Population Projections Program; 2020 and 2019 population projections were updated March 2022, and 2018 & earlier population projections were from the prior version. | ||
| Data Source: Texas NEDSS Finalized Data File, 2011-2020, Texas Notifiable Conditions. | ||
| Varicella Cases and Incidence Ratesa in Texas by Age Group, 2015-2020 | ||||||||||||
| Age Group (Yrs) | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | ||||||
| Cases | IR | Cases | IR | Cases | IR | Cases | IR | Cases | IR | Cases | IR | |
| <1 | 195 | 47.3 | 134 | 32.0 | 135 | 31.7 | 85 | 19.6 | 153 | 36.2 | 50 | 11.7 |
| 1-4 | 356 | 22.3 | 343 | 21.2 | 274 | 16.6 | 285 | 17.0 | 290 | 17.4 | 86 | 5.1 |
| 5-9 | 419 | 21.1 | 310 | 15.5 | 286 | 14.3 | 260 | 12.9 | 289 | 14.2 | 92 | 4.5 |
| 10-14 | 197 | 9.5 | 169 | 8.1 | 142 | 6.7 | 114 | 5.3 | 155 | 7.4 | 40 | 1.9 |
| 15-19 | 82 | 4.0 | 92 | 4.4 | 66 | 3.1 | 50 | 2.3 | 116 | 5.6 | 21 | 1.0 |
| 20-29 | 84 | 2.1 | 121 | 3.0 | 105 | 2.5 | 66 | 1.6 | 147 | 3.4 | 23 | 0.5 |
| 30-39 | 75 | 1.9 | 93 | 2.4 | 75 | 1.9 | 61 | 1.5 | 80 | 1.9 | 17 | 0.4 |
| 40-49 | 51 | 1.4 | 60 | 1.6 | 47 | 1.3 | 35 | 0.9 | 45 | 1.2 | 13 | 0.3 |
| 50-59 | 16 | 0.5 | 13 | 0.4 | 10 | 0.3 | 11 | - | 14 | - | 5 | 0.1 |
| 60 and Up | 16 | 0.3 | 6 | 0.1 | 6 | 0.1 | 5 | - | - | - | 1 | 0.0 |
| Unknown | 0 | - | 0 | - | 0 | - | 0 | - | 0 | - | 0 | - |
| aIncidence rates (IR) calculated per 100,000 population. Population data are projected population from Texas Demographic Center's Texas Population Projections Program, updated March 2022. | ||||||||||||
| bAge is calculated from date of birth to date of patient symptom onset. Other event dates are used when the symptom onset date is unknown. | ||||||||||||
| Note: Per Emerging and Acute Infectious Disease Unit Data Suppression policy, beginning with data published after June 2021, rates are not provided (-) when the Relative Standard Error exceeds 25% (n<16). | ||||||||||||
| Data Source: Texas NEDSS Finalized Data File, 2020, Texas Notifiable Conditions. | ||||||||||||
| Varicella Cases and Incidence Ratesa in Texas by Age Group, 2011-2014 | ||||||||
| Age Group (Yrs) | 2011 | 2012 | 2013 | 2014 | ||||
| Cases | IR | Cases | IR | Cases | IR | Cases | IR | |
| <1 | 191 | 46.7 | 177 | 42.9 | 180 | 43.9 | 173 | 41.4 |
| 1-4 | 659 | 41.2 | 536 | 33.2 | 499 | 31.7 | 425 | 25.8 |
| 5-9 | 719 | 37.9 | 687 | 35.7 | 458 | 23.1 | 433 | 21.9 |
| 10-14 | 455 | 26.7 | 332 | 19.0 | 264 | 13.1 | 207 | 11.2 |
| 15-19 | 112 | 6.2 | 127 | 7.1 | 107 | 5.5 | 94 | 5.3 |
| 20-29 | 148 | 3.8 | 188 | 4.7 | 127 | 3.2 | 112 | 2.7 |
| 30-39 | 116 | 3.0 | 140 | 3.5 | 101 | 2.4 | 75 | 1.8 |
| 40-49 | 64 | 1.8 | 74 | 2.0 | 57 | 1.5 | 57 | 1.5 |
| 50-59 | 47 | 1.5 | 69 | 2.1 | 32 | 1.0 | 30 | 0.9 |
| 60 and Up | 47 | 1.2 | 80 | 2.0 | 48 | 1.2 | 41 | 1.0 |
| Unknown | 0 | - | 0 | - | 1 | - | 0 | - |
| aIncidence rates (IR) calculated per 100,000 population. Population data are projected population from Texas Demographic Center's Texas Population Projections Program, updated March 2022. | ||||||||
| bAge is calculated from date of birth to date of patient symptom onset. Other event dates are used when the symptom onset date is unknown. | ||||||||
| Note: Per Emerging and Acute Infectious Disease Unit Data Suppression policy, beginning with data published after June 2021, rates are not provided (-) when the Relative Standard Error exceeds 25% (n<16). | ||||||||
| Data Source: Texas NEDSS Finalized Data File, 2020, Texas Notifiable Conditions. | ||||||||
| Varicella (Chickenpox) Case Count and Incidence Ratesa for the Most Populous Texas Counties, 2020 | ||
| County | Case Count | Incidence Rate |
| Bexar | 15 | 0.7 |
| Brazoria | 5 | 1.3 |
| Cameron | 8 | 1.9 |
| Collin | 20 | 1.9 |
| Dallas | 23 | 0.8 |
| Denton | 13 | 1.4 |
| El Paso | 0 | 0.0 |
| Fort Bend | 7 | 0.8 |
| Harris | 45 | 0.9 |
| Hidalgo | 17 | 2.0 |
| Montgomery | 7 | 1.1 |
| Nueces | 3 | 0.8 |
| Tarrant | 12 | 0.6 |
| Travis | 20 | 1.5 |
| Williamson | 24 | 4.1 |
| Statewide Total (All Counties) | 348 | 1.2 |
| aIncidence rates (IR) are calculated per 100,000 population. Population data are projected population from Texas Demographic Center’s Texas Populations Projections Program updated March 2022. | ||
| Note: Per Emerging and Acute Infectious Disease Unit Data Suppression policy, beginning with data published after September 2021, conditions with statewide case counts of 1-4 are not provided (-). | ||
| Note: Per Emerging and Acute Infectious Disease Unit Data Suppression policy, beginning with data published after June 2021, rates are not provided (-) when the Relative Standard Error exceeds 25% (n <16). | ||
| Data Source: Texas NEDSS Finalized Data File, 2020, Texas Notifiable Conditions. | ||
For more data regarding this condition, please see our Infectious Disease Annual Reports or submit a Data Request.