There isn’t a time limit on how fast you need to provide your saliva sample, but it helps us if you do this as soon as you can. If the sample is left a long time before it is returned (several months) it becomes less likely that the DNA can be extracted.

The largest ever DNA study of ME/CFS

A partnership between

Action for ME logo
Forward ME Logo
UKRI MRC Human Genetics Unit logo
National Institute for health research