The measles outbreak in Wales remains a concern says Public Health Wales with 1,356 cases of measles reported in Wales since last November.
The number of cases associated with the outbreak centred in the Swansea area have risen by 14 since Friday 24 May.
Young people aged 10 to 18 are being encouraged to use the half term break to catch up on any missed doses of MMR vaccine.
PHW says around 33,000 young people in this age group are still not fully vaccinated.
Dr Brendan Mason, Regional Epidemiologist said, “If children and young people are to enjoy visiting friends, family, events and attractions where they will meet large numbers of other young people, they should go to their GP to get vaccinated first."
He added, "Measles came to Wales from young people visiting such attractions and has spread wherever there have been large gatherings of children."
Unvaccinated children aged between six and 12 months living in or travelling to the outbreak areas of Swansea and Neath Port Talbot or North Powys can have a vaccination at their GP surgery.
2013 is expected to be the worst year for measles in the UK for the past two decades. Read more about the illness and how it is treated.
If the Government's top adviser on immunisation thinks the risk of an emergency in England is a possibility, I believe him.