The Centers for Disease Control and Prevention has found that non-medical vaccine exemptions are rising in certain states, including in states that hadn’t previously been considered hotbeds of anti-vaccination sentiment, STAT reported.

It’s a trend infectious disease experts are watching as more states could be at risk for dangerous outbreaks.

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Nearly 80,000 U.S. kindergarteners were without at least one vaccine in the 2013-2014 school year, CDC data shows. Exemptions overall have fallen since — to around 72,000. However, there is an uptick in children without vaccinations in Connecticut, Florida, Iowa, Kentucky, Maryland, New York, North Carolina, North Dakota, Ohio, Oklahoma, and Virginia.

Connecticut has seen non-medical exemptions rise from 0.8 to 1.7 percent. “It’s something [we’ll] keep an eye on,” Mick Bolduc, epidemiologist for Connecticut’s immunization program, told STAT.

Related: More Mumps Cases Than in Years Gone By

State immunization managers and infectious disease experts are watching the situation closely, especially as a number of outbreaks, including the mumps this year, continue to spread. Vaccines, on a global scale, can be — and have been — life-saving.