Parents in Jersey are being urged to make sure their children are vaccinated against polio.
It's after the virus was detected in London sewers.
The vaccine is given at eight, 12 and 16 weeks old, with boosters administered at three years and four months, and 13 or 14 years old.
Jersey's Director of Public Health, Professor Peter Bradley, stressed the importance of making sure children are immunised:
"While the threat of polio is very low, it is vital that children are vaccinated against the virus and that parents take up the offer for all routine childhood vaccinations.
We are committed to the global eradication of polio and vaccination remains the best way to prevent infection and protect yourselves and others."
Anyone who isn't sure whether their child has been vaccinated against polio is urged to contact their GP.