Dr Marion Lyons of Public Health Wales says with 20 new cases of measles daily in Wales at the moment a death would not be surprising.
An investigation is underway on Friday to find out if a 25 year-old man from Port Tennant near Swansea died from the virus.
More top news
James Crichton-Smith takes a look back at the twists and turns of the general election campaign in Wales so far.
The athlete from Bridgend won the T63 shot put with a 15.32m effort on Sunday.
Cardiff City confirmed the club has parted ways with the manager of three years after a mixed start to the season.