It comes just weeks after a Westmeath man died after contracting the disease.
A case of measles has been diagnosed in Northern Ireland for the first time in seven years.
It had been expected, given a recent rise in cases in the UK and Europe.
A 48 year old Westmeath man died earlier this month after contracting the disease - the first confirmed case in the Republic so far this year.
The North's Public Health Agency says all appropriate health actions are being undertaken - and both it and the HSE are urging people to avail of the MMR vaccine.
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