2020-2021 Texas Influenza Surveillance Activity

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

2020-2021 Season/2021 MMWR Week 39

Please note: The 2020-2021 influenza season began on September 27, 2020. 
Reports from the 2019-20 season.


*Please note, some aspects of influenza surveillance may be affected by current COVID-19 response activities. For information about COVID-19 in Texas visit the DSHS Covid-19 webpage.

Compared to the previous week, the percentage of specimens testing positive for influenza reported by hospital laboratories has increased. The percentage of patient visits due to influenza-like illness (ILI) has decreased. No influenza-associated pediatric deaths were reported. No influenza-associated institutional outbreaks or school closures were reported.

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

Texas Influenza and Influenza-like Illness
Surveillance Component
Previous Week
Statewide ILINet Activity Indicator assigned
by CDC (intensity of influenza-like illness)
Decrease Minimal Low -
Percentage of specimens positive for
influenza by hospital laboratories

▲ 0.08%

0.27% 0.19% 1
Percentage of visits due to ILI (ILINet)

▼ 0.06%

2.21% 2.27% 2
Number of regions reporting
increased flu/ILI activity
No change 2 2 5
Number of regions reporting
decreased flu/ILI activity
No change 1 1 5
Number of variant/novel influenza
No cases
0 0 5
Number of ILI/influenza outbreaks No change 0 0 5
Number of pediatric influenza deaths No change  0 0 6
†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 October 2, 2021 (MMWR Week 39)

Flu Week 39updated

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.

2020-2021 Texas Influenza Surveillance Activity Reports:

06/18/2106/11/2106/04/2105/28/21, 05/21/2105/14/2105/07/2104/30/21,
04/23/21, 04/16/21, 04/09/21,04/01/21, 03/26/21, 03/19/21, 03/12/21, 03/05/21,
02/26/21, 02/19/21, 02/12/21, 02/05/2101/29/21, 01/22/21, 01/15/21, 01/08/21,
12/30/20, 12/23/20, 12/18/20, 12/11/20, 12/04/2011/25/20, 11/20/20, 11/13/20,
11/06/20, 10/30/20, 10/23/20, 10/16/20, 10/09/20

Reports from the 2019-2020 season.