South Plains region of Texas has grown to 223 cases. Twenty-nine of those infected have been hospitalized and one school-aged child has died, according to the latest update from the Texas Department of State Health Services.

In what could become a spiraling health crisis for the state, public health officials in Lamar County on Thursday announced four confirmed cases of measles in their jurisdiction. Paris-Lamar County Health District officials said the extremely contagious virus had been diagnosed in four patients who range in age from 5 months to adulthood.

Since it started in late January, the Texas measles outbreak in the South Plains region of the state has surpassed 200 cases. Here's what we know.