A blood cancer charity is urging Sheffield people to sign up for the chance to potentially save a life.
Delete Blood Cancer UK is asking people to register to be on standby to donate some of their blood stem cells to someone who needs them.
The blood stem cells can only be donated to somebody who is the same tissue-type as you, and there are only usually one or two people in the general population who will be a match.
There are currently 450 people in Sheffield registered with the charity.
Deirdra Taylor of Delete Blood Cancer UK said: “If you register, and do match to a patient, you will possibly be found to be their only match.”
Register and request a cheek swab kit for a self tissue test at www.deletebloodcancer.org.uk