The Texas State Health Department issued a whooping cough advisory for the entire State.
So far this year, there have been more than 1,000 cases of whooping cough and six deaths.
The Department of State Health Services urges people the get immunizations against the illness.
This is the deadliest year since 2005.
Here's some symptoms of whooping cough: a persistent cough that lasts a long time, a whooping sound when you cough, and turning red or blue or vomiting during fits of coughing.
See your doctor if you have any of these symptoms.