Manx health chiefs will assess any spread of measles, as they decide what action might be appropriate here in case of an outbreak.
Pupils in South Wales have been given letters for their parents, asking them whether they've been vaccinated against the disease.
Health officials there are trying to cope with more than 700 cases, to stop it spreading further.
Manx Director of Public Health Dr Parameswaran Kishore says no cases have been reported in the Isle of Man so far:
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