<qa>  What is the name of the sample that would be used in the laboratory analysis of clinical trials ofThe samples would be used in the laboratory analysis of clinical trials of vaccines used in adults and children, and some samples in pre-clinical animal experiments testing new vaccines before they enter human-stage testing. Most people have some form of protection against most bacteria already, so not everyone is a suitable blood donor for this laboratory test. We therefore start by taking a small blood sample and test this one before asking for more blood if we found yours suitable for the work we do. 