Three North Texas counties have confirmed new cases of measles and on Tuesday, we're expecting to get another update on the West Texas outbreak.

There have been four measles cases reported in the Dallas-Fort Worth area this year: one in Collin County, one in Denton County and two in Rockwall County. State authorities have not officially tied any of those cases to the outbreak that began in Gaines County, and all four appear in the state public health department’s list of “other 2025″ cases.

With two confirmed measles cases in Travis County and a large outbreak in West Texas, do you need a measles booster? Here's what to know.