Blood samples should be returned to the lab immediately i.e. same day, using the method of postage advised by the lab.
Samples must be returned to the lab on a Monday to Thursday (inclusive) and samples should not be returned on a Friday or Saturday (unless otherwise confirmed).
Some samples e.g. frozen saliva, are stable for longer so could be returned to the lab a couple of days later (but still by using a ‘next day delivery’ method as advised by the lab). Please check test instructions.
Where the test requires multiple stool samples, then the samples can be returned to the lab once all samples are collected, in one package, using the courier service recommended by the lab. Ensure samples are shipped Monday to Thursday.