Last updated at 15:35

Big push to vaccinate 1m kids against measles

To enjoy the CBBC Newsround website at its best you will need to have JavaScript turned on.

There's a big new push to protect one million school children in England from measles.

Cases of the illness have been growing in England and Wales in recent months.

Nearly 900 cases of the virus have been diagnosed in an epidemic in South Wales.

Now health officials are warning that many kids who weren't vaccinated when they were younger, are now at risk.

Martin has more on this story.