As Gaines County, Texas, deals with a measles outbreak, experts are reminding Americans that outbreaks like these can be avoided with available safe and effective vaccines.

Nine of those infected were hospitalized and more cases are likely, health authorities said. U.S. vaccination rates for measles are falling, according to the CDC.

Experts worry measles outbreaks like one in West Texas could become more common due to a rise in nonmedical vaccine exemptions.