Three cases have been found in the Dublin Midlands region.
The HSE says the number of confirmed cases of measles remains a 'concern.'
There have been three confirmed cases of the virus in the Dublin Midlands region, while there's been 19 around the country.
That includes three outbreaks, which were all confined to private houses, with men having the highest number of confirmed cases.
Consultant in Public Health Medicine with the Department of Public Health in the HSE Dublin and Midlands region, Dr. Mary Ward, says if you have measles, you'll know about it:
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