Texas DSHS in a statement: "The best way to prevent getting sick is to be immunized with two doses of a vaccine against measles, which is primarily administered as the combination measles-mumps-rubella vaccine. Two doses of the MMR vaccine are highly effective at preventing measles."

Two people in Oklahoma have likely contracted measles infections linked to a mushrooming outbreak that began in West Texas, which has now risen to at least 258 cases since late January. On Tuesday, Oklahoma's health department reported that two people had "exposure associated with the Texas and New Mexico outbreak" and then reported symptoms consistent with measles.