The efforts to vaccinate susceptible children in the Abertawe Bro Morgannwg University Health Board area have been tremendous and we are delighted to see that around half of children needing vaccination have now received the MMR.
But with around 50,000 children in the 10 to 18 age group still not vaccinated, and more than 1,000 cases now reported to us, we cannot be complacent.
– Dr Marion Lyons, Director of Health Protection for Public Health Wales
While not enough children are vaccinated, this outbreak can easily spread anywhere in Wales.
Therefore we urge parents of children, and young people themselves, to take up opportunities to receive the MMR vaccine as a matter of urgency.
The number of measles cases recorded in the Swansea outbreak - which started last November - has passed 1,000, Public Health Wales said.
Some 1,011 cases have now been recorded and 9,000 people aged between 10 and 18 still need to be vaccinated.
In the last month, 4,000 people have received the MMR jab.
But Public Health Wales has warned that the country as a whole needs to replicate Swansea's response to the outbreak, with 50,000 10 to 18 year-olds still unvaccinated across Wales.