Influenza (Flu)

Picture of a needle in a vaccination vile with the words Flu Season.

What is Influenza (Flu)?

Flu is a contagious respiratory illness caused by influenza viruses that infect the nose, throat, and sometimes the lungs. It can cause mild to severe illness, and at times can lead to death. The best way to prevent flu is by getting a flu vaccine each year.

The Health District receives reports from hospitals, clinics, laboratories, school, nursing homes, and other healthcare partners on the number of flu and flu-like illnesses on a weekly basis year-round. This information is calculated and reported to the Texas Department of State Health Services.

Visit our Immunization Services page for more information about scheduling your flu shot at the Waco-McLennan County Health District.

Waco-McLennan County Flu Dashboard (updated 1/25/2023)

Current Flu Cases
Flu A   20
Flu B 17
Flu ND   0
 ILI 197

Graph showing McLennan County flu cases for 2022-2023

Flu activity is defined as:

  • Lab-confirmed case: Flu A, Flu B, Not Differentiated Flu
  • Influenza-like illness activity (ILI): ILI is defined as fever over 100ºF and cough and/or a sore throat in the absence of another diagnosis

Flu vaccines have been updated to better match circulating flu virus and any licensed, age-appropriate flu vaccines are recommended. The nasal spray flu vaccine (LAIV) is again a vaccine option. Ask your health provider about what vaccine is right for you.

Child in a superhero costume encouraging everyone to get their flu and covid vaccines.

Flu Activity in Texas

Flu Activity in the United States