Public Health Wales say that tests on a man who died in Swansea have confirmed that he had measles.
In a statement, they said that the tests only confirmed that "the deceased had measles at the time of his death" but that "further investigations are being undertaken by the Swansea Coroner to establish the cause of death."
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Wales have qualified for the Euro 2016 quarter finals after beating Northern Ireland 1-0 in Paris.
A rally has been held in Cardiff following the EU referendum to show support to migrant communities.
It's 0-0 at half time in Paris as Wales face Northern Ireland in the last 16 of Euro 2016.