An outbreak of measles in the South Plains of Texas is continuing to grow, with the number of cases doubling in less than a week. At least 48 cases were identified with symptom onset within the last three weeks,

In the last three weeks, 48 cases of measles have been identified, sending 13 patients to the hospital, according to the Texas Department of State Health Services.

Measles is marked by high fevers and a telltale rash. People can spread the infection from four days before the rash develops to four days afterward. In addition to the miserable illness, measles can cause complications, particularly in children younger than 5, pregnant people, adults over the age of 20, and people with compromised immune systems.