Health chiefs say they 'continue to be concerned' at the number of cases of measles in the Swansea and Neath Port Talbot areas.
Nearly 200 people have been diagnosed since the outbreak started in November, with 20 new cases in the last week alone.
More than 30 schools and nurseries have been affected so far.
Public Health Wales says it is working closely with Abertawe Bro Morgannwg University Health Board to combat the outbreak.
More top news
A young boy has been praised for his quick-thinking actions after his mother collapsed at home.
George North has ended speculation over his future by signing a new contract at Northampton.
A man who died from stab wounds in Newport has been named by police.