A medical team is based at a sports centre today to take mouth swabs of possible bone marrow donors.
Until 7pm this evening Loughton Leisure Centre is open for anyone who would like to offer their saliva for testing.
Anyone interested must fill out an application form. Organisers say the entire process takes just a few minutes.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here