So can you tell me what should pathologists be aware of when they're testing for COVID-19? Yeah.

So Claudine 18.2 is getting more popular now for the right reason.

So as any other, this is a test which is entirely reliant on good immunohistochemistry practice within the laboratory.

So you need to have the right choice of antibodies.

And I think at the moment we use the Ventana antibody.

And It's important to choose the right biopsy.

You know, if you have a very old biopsy, say 10 years old, it's been sitting in some archive for 10 years, that may or may not work.

So old tissue might not be good, but can you sort of expand on what you think the timeline for tissue collection might be?