There are mechanisms for t-cell testing in reasonably wide use now. from what I understand its not done that much comparatively is because its bloody expensive.

There are mechanisms for t-cell testing in reasonably wide use now. from what I understand its not done that much comparatively is because its bloody expensive. I think one of the mechanisms is here: https://en.wikipedia.org/wiki/ELISpothttps://en.wikipedia.org/wiki/ELISpot https://en.wikipedia.org/wiki/ELISpothttps://en.wikipedia.or... However I would take all of this with a pinch of salt. I asked my doctor friend about it, they said "We use t-cell tests for a bunch of things, but its really expensive. I can't remember what thing we were looking for, probably TB, everyone had TB in that ward, so it might be that."