The HSE has issued a warning after two cases of measles were confirmed in students at NUI Galway.
Measles is highly contagious and can cause serious complications, particularly for children.
The key symptoms to watch out for are a skin rash, high temperature, cough, runny nose and red or watery eyes.
The HSE is working closely with NUIG to provide assistance in dealing with the outbreak.
Public Health Director for the West Dr Diarmuid O' Donovan told Galway Bay FM there was a risk of more people in NUI and in Galway generally, getting measles.
"We're particularly concerned about children who have not been vaccinated. For the majority of people, it's not a concern," he said.
"If people have not been vaccinated they need to get vaccinated as soon as possible," he said.