Experts recommend that anyone not vaccinated against the measles should avoid large events like the Houston Rodeo amid an outbreak in northwest Texas.
Texas doctors said there's no harm in getting another measles vaccine if you don't know whether you were vaccinated as a child.
Since Tuesday is the first official day of the carnival and shows, HoustonRodeo officials are alerting goers to be vigilant about their health.
For the first time in years, Americans are in the midst of an outbreak of the measles virus. Earlier this week, an unvaccinated child in Texas was the first person to die from the virus in a decade, and more than 100 people have confirmed infections.
The Houston Health department is investigating two possible cases of measles in the city. The Houston rodeo plans to monitor the measles outbreak.