Parents across Somerset are being asked to verify that their children have received two doses of the MMR vaccine.
The Somerset County Council public health team has issued an appeal after Bristol and other UK territories report a sharp increase in measles this year
Bristol has seen 86 confirmed cases of measles and another 20 likely cases since January.
Measles are preventable by the safe, effective MMR vaccine offered as part of the Childhood Immunization Program  Children typically receive the vaccine within one month of their first birthday and before school after three years and four months.
Dominic Mellon , Advisor for Public Health England South West infectious disease control, said, "Unfortunately, we know that the school environment provides an ideal place for infections to circulate and spread."
"If your child catches measles, they will Beyond feeling very uncomfortable, even skip several days at school.
"We know that life can come busy with children If you can not remember, just ask your family doctor who can check your child's records."
"If you forget a dose, you may a catch-up vaccine can be easily arranged by contacting your family doctor. "
Councilor Christine Lawrence, Cabinet Member for Public Health and Well-being at the Somerset County Council, said: "I strongly encourage parents and caregivers to check that their children are fully vaccinated.
"Somerset has only seen two cases of measles this year, but we must not be complacent." It's never too late to be vaccinated. Measles are very contagious and can be very uncomfortable, even life threatening if you or Your children need it, then do not turn off the vaccine.
"It's quick and easy to get and really the best protection for everyone, it's time to turn measles into a disease of the past."