Measles cases in West Texas are still rising two months after the outbreak began. Local public health officials say they expect the outbreak to last for at least several more months and the case number is likely an undercount. More people have received a measles, mumps and rubella vaccination this year in Texas and New Mexico compared to last year, though officials would like it to be higher. Pharmacies across the U.S., especially in Texas, are seeing more demand for MMR shots. University of North Carolina epidemiologist Justin Lessler says measles has a slow way of spreading that makes it especially hard to contain.