The HSE has confirmed that the measles outbreak in Co Donegal last week is continuing and has urged everyone who believes that they may have been affected by the illness to contact their GP.
Two cases of the illness were confirmed last Wednesday but today there have been another two cases confirmed with three more probable cases and several other possible ones.
Measles is highly contagious and can have serious complications.
The HSE has urged people who have any of the symptoms to contact their GP and to avoid spreading the disease.
They have also advised people who think they may have the disease to call their GP surgery ahead of their visit to warn them and to prevent it from spreading.
Last week the HSE said that the number of children in Donegal that had received the measles, mumps, and rubella (MMR) vaccine has dropped slightly over the past few years.
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They have said that as soon as vaccination rates fall, old diseases re-emerge and this is why measles has seen an outbreak cross Ireland and Europe.
The symptoms of this illness are a rash, fever, conjunctivitis (red eyes), cough or a runny nose with the rash usually starting four days after the other symptoms.
Measles infection can have some serious complications such as pneumonia, seizures and encephalitis (inflammation of the brain).
One out of two people out of every 1,000 who are affected by the illness will die.