Measles: 189 cases in Swansea, Neath and Port Talbot
An outbreak of 189 cases of measles has been reported in Swansea, Neath and Port Talbot, Public Health Wales says.
It began in November but 20 cases have been notified in the last week and the total is more than for the whole of Wales in the last three years.
So far, 32 secondary schools, primary schools and nurseries are affected.
Parents are being urged to make sure their children receive the measles, mumps and rubella (MMR) vaccination.
The outbreak only affects the Abertawe Bro Morgannwg University Health Board area and eclipses the number of cases across the whole of Wales since 2010.
There were 159 cases in 2009, still lower than the current outbreak in south west Wales.
Dr Marion Lyons, director of health protection for Public Health Wales (PHW), said: "We continue to be concerned at the number of cases of measles we are seeing in the Swansea and Neath Port Talbot areas.
"We cannot emphasise enough that measles is an illness that can kill, or leave patients with permanent complications including severe brain damage, and the only protection is two doses of the MMR vaccination."
She added that people most at risk of catching measles are children of school age who have not had two doses of MMR.
Children should receive the first dose of the vaccine at 12 to 13 months of age and the second at three years and four months of age
PHW estimates there are more than 8,500 school children at risk of measles in the Abertawe Bro Morgannwg area.
Many people who catch measles will have a fever, cough, red eyes, and blocked nose and feel generally unwell.
The blotchy rash appears a few days later beginning on the face and spreading downwards to the rest of the body over several days.