There is an urgent need to vaccinate children in South Wales as measles figures hit close to 900 confirmed cases.
The jump has brought the total number of cases in Wales to 981 and children aged 1-4 and 10-14 years old have been most affected by the outbreak.
More than 10,000 non-routine MMR vaccines have been given across Wales over the past week, but Public Health Wales is warning the outbreak is showing no signs of ending.
Over the past seven days 80 people have been admitted to hospital, with 78 new cases bringing the total to 886 cases.
Dr Marion Lyons, director of health protection for Public Health Wales, said: “We have seen in the last few days that measles can be potentially fatal and no one should be complacent about the severity of measles.
“It can kill but can be prevented by a simple, safe vaccine.”
Parents can be informed that the MMR vaccine is recommended by the World Health Organisation, the Department of Health and Public Health Wales as the safest way to protect children from measles.