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    Infectious Disease Control Unit
    Mail Code: 1960
    PO BOX 149347 - Austin, TX 78714-9347
    1100 West 49th Street, Suite T801
    Austin, TX 78714

    Phone: (512) 776-7676
    Fax: (512) 776-7616


2018-2019 Texas Influenza Surveillance Activity Report

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The current extended Texas Influenza Surveillance Report is available in PDF format:

Current Extended Flu Activity Report (PDF)
(April 7, 2019 - April 13, 2019)  
Report produced on 4/18/2019

2018-2019 Season/2019 MMWR Week 15

Please note: The 2018-2019 influenza season began on September 30, 2018. 
(For Reports from the 2017-18 season, please refer to the link at the bottom of the page.)


Influenza activity is decreasing across the state of Texas. The influenza season appears to have peaked in mid-February. Compared to the previous week, the percentage of patient visits due to influenza-like illness (ILI) slightly decreased. The percentage of specimens testing positive for influenza reported by hospital laboratories marginally increased. One influenza-associated pediatric death was reported. Fourteen ILI/influenza-associated outbreaks were reported but the majority occurred earlier in the season. In addition to flu, other respiratory viruses—especially rhinovirus/enterovirus—were detected in Texas during week 15.

Table 1: Summary of Texas Influenza (Flu) and Influenza-like Illness (ILI) Activity for the Current Week 

Texas Surveillance Component Change from Previous Week
Current Week  Previous Week
Page of Report
Statewide influenza activity level reported to CDC (geographic spread of influenza) Decreased
Sporadic Local
Statewide ILINet Activity Indicator assigned by CDC (intensity of influenza-like illness)
No change Low Low -
Percentage of specimens positive for influenza by hospital laboratories
10.18% 10.02%
Percentage of visits due to ILI (ILINet)
3.91% 4.39% 4
Number of regions reporting increased flu/ILI activity ▼1
0 1 6
Number of regions reporting decreased flu/ILI activity  ▼1
6 7 6
Number of variant/novel influenza infections
No cases reported 0 0
Number of ILI/influenza outbreaks
14 7 6
Number of pediatric influenza deaths New case reported 1 0 7
†Data displayed have been updated since last week’s flu report with any new reports received.

Texas Map Displaying the Highest Level of Influenza or
ILI Activity Reported by County for the Week ending
April 13, 2019 (MMWR Week 15)

Statewide Influenza Activity Map:

Week 15 Flu


Please note: The majority of influenza cases are not reportable by law in Texas. This map contains data from sentinel sites and only displays influenza and ILI cases that were reported to public health. Positive laboratory results are reported according to specimen collection date, or date received in the laboratory if the former is unknown.

Note: The current extended Texas Influenza Surveillance Report is in PDF format.

2018-2019 Texas Influenza Surveillance Activity Reports:

04/18/1904/12/19, 04/05/19, 03/29/19, 03/22/19, 03/15/19, 03/08/19, 03/01/19, 02/22/19, 02/15/19, 02/08/19, 02/01/19, 01/25/19, 01/18/19, 01/11/19, 01/04/19, 01/02/19, 12/21/18, 12/14/18, 12/07/18, 11/30/18, 11/28/18, 11/16/18, 11/09/18, 11/02/18, 10/26/18, 10/19/18, 10/12/18

Reports from the 2017-2018 season.

Last updated April 18, 2019