IDCU HomeInfectious Diseases A-CD-GH-LM-QR-ST-ZHealthcare SafetyIDCU Health TopicsDisease ReportingRelated Rules & RegulationsImmunization BranchAbout IDCURelated DSHS SitesStaff Contact List
  • Contact Us

    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


2017 - 2018 Texas Influenza Surveillance Activity Report


Home         FAQs        Reporting         Investigation         Immunization         Resources

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

Current Extended Flu Activity Report (PDF)


Please note: The 2017-2018 influenza season began on October 1, 2017. 
For reports from the 2016-2017 season, please see

2017-2018 Season/2018 MMWR Week 19

(May 6, 2018 – May 12, 2018)

Report produced on 05/18/2018


Influenza activity remains low across the state of Texas. It appears that influenza activity peaked in late January. Compared to the previous week, the percentage of specimens testing positive for influenza reported by hospital laboratories slightly increased. The percentage of patient visits due to influenza-like illness (ILI) and the percentage of specimens testing positive for influenza reported by public health laboratories marginally decreased. No influenza-associated pediatric deaths were reported. One influenza-associated outbreak was reported. In addition to flu, other respiratory viruses—especially rhinovirus/enterovirus—were detected in Texas during week 19.

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) No change Sporadic Sporadic --
Statewide ILINet Activity Indicator assigned by CDC (intensity of influenza-like illness) No change Minimal Minimal --
Percentage of specimens positive for influenza by hospital laboratories ▲0.15% 1.64% 1.49% 1
Percentage of specimens positive for influenza by public health laboratories ▼1.02% 6.67% 7.69% 2
Percentage of visits due to ILI (ILINet) ▼0.80% 2.17% 2.97% 4
Number of regions reporting increased flu/ILI activity No change 0 0 7
Number of regions reporting decreased flu/ILI activity No change 6 6 7
Number of variant/novel influenza infections No cases reported 0 0 7
Number of ILI/influenza outbreaks ▼5
1 6 7
Number of pediatric influenza deaths No new cases reported 0 0 8

†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 May 12, 2018 (MMWR Week 19)

Statewide Influenza Activity Map:

Week 19 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 in PDF format.

2017-2018 Texas Influenza Surveillance Activity Reports:

05/18/18, 05/11/18, 05/04/1804/26/18, 04/20/1804/13/18, 04/06/18, 03/29/18,
03/23/18, 03/16/18, 03/09/18, 03/02/18, 02/23/18, 02/16/18, 02/09/18, 02/02/18,
01/27/18, 01/20/18, 01/12/18, 01/05/18, 12/29/17, 12/22/17, 12/15/17, 12/08/17,
12/01/17, 11/29/17, 11/17/17, 11/10/17, 11/03/17, 10/26/17, 10/20/17, 10/12/17

Last updated May 18, 2018