The HSE issued a warning to parents in Galway after a horseradish outbreak in recent weeks.
Parents of school students in the city of Claregalway received the message after some children presented symptoms of the disease.
This comes after a number of reported cases in the region, especially among young people aged 15 to 29.
The HSE advises anyone who is unsure if he had two doses of MMR vaccine to request additional dose, RTE reports.
The vaccine provides the best protection from infection, but it should be noted that it can be another 28 days before it takes effect.
Parents are also advised that all children who show humps-like symptoms stay out of school at least five days after the onset of swelling in the neck.
Last month HSE issued a warning after 45 people were diagnosed with mumps in Western Ireland within seven weeks.
However, experts warn that children can infect others even before visible swelling, and sufferers will exhibit other symptoms such as sore throat and cough.
Horseradish can spread through direct contact such as saliva, but also through air particles after coughing or sneezing.
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