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.
The number of measles cases recorded in the Swansea outbreak has passed 1,000, according to Public Health Wales.
An ITV News/Com Res poll has found 71% of people think parents are acting irresponsibly if they don't get the MMR jab for their children.
71% of people think parents who do not vaccinate their children with MMR vaccine are being irresponsible, a ITV News/Com Res poll suggests.