From the Texas Medical Association:
If you haven’t received your flu vaccination yet, it’s not too late. Texas physicians say getting vaccinated against the flu is the best way to protect yourself and your family from flu during the holiday season and winter months.
Flu, or influenza, is a highly contagious respiratory virus that is much more severe than a common cold. Even healthy people can get very sick from the flu and spread it to others. Every year about 200,000 people in the nation are hospitalized from flu-related illness.