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Varicella (Chickenpox) Data

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Varicella Incidence Case Maps by Year (jpeg images)

Varicella-Rates-2019   Varicella-Rates-2018   Varicella2016   2015 Map   Varicella2014

           2019                       2018                       2016                       2015                         2014

Varicella2013   Varicella2012   2011 varicella incidence rate map   varicella 2010 incidence

           2013                         2012                      2011                        2010

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. 

Last updated July 26, 2022