According to the Centers for Disease Control and Prevention, Texas is one of states with the highest level of flu activity. (source)

Children and infants under the age of 6 months are at the highest risk of of complications and/or hospitalization from the flu.

Be Aware of Common Flu Symptoms in Infants & Children:

Fever or chills
Cough or sore throat
Runny or stuffy nose
Headache or muscle or body aches
Being tired
Not being hungry
Vomiting and diarrhea

Read more here.

Here are some tips from the CDC for Flu Prevention for Caregivers:

1) Get a flu vaccine and make sure others in the household are vaccinated against the flu.
2) Frequently wash your hands with soap and water.
3) Keep surfaces clean and disinfected frequently.
4) Monitor your child for any signs or symptoms of the flu.