Almost 200 cases of measles have been diagnosed in the Swansea and Neath Port Talbot areas since November, with 20 cases identified in the last week alone.
Symptoms can include:
- Red eyes
- Blocked nose
- Blotchy rash beginning on the face and spreading downwards to the rest of the body over several days
Typically people will be infectious from the day before their first symptoms until four to five days after the appearance of the rash.
Source: Public Health Wales
More top news
After the warmest Halloween on record, it's all about to go rapidly downhill!
An artist has created a tribute portrait of late presenter Lynda Bellingham made entirely from beef Oxo cubes.
A speed camera on a busy stretch of road in Swansea is catching 200 drivers a day - but so far none have been fined.