Dr. Ana Montanez is working overtime in Lubbock to contact vaccine-hesitant parents, explaining the grave risks posed by a disease that most American families have never seen, and one that can be prevented through immunization.

A possible second measles death has been recorded in the U.S. this year after a New Mexico resident tested positive for the virus following their death.

State and local health officials are urging individuals to receive MMR vaccine as Texas reaches 124 cases this week. Here is what we know.