I just check my last cd57 record and cd4 is not part of it.
cd4/cd8 ratio is brought up in chronic fatigue/ ME illness.
These are all different T cells. There are more. the cd57 is natural killer cells, similar to T cells or maybe one type of them , i dont know.
And there are just plain T cell blood tests to from regular labs like Quest - I posted asking about this with zero replies.
One lyme test I'm familiar with has T cell levels as part of the lyme test, but I'm not paying $400 again.
C4a and C3A are not related to the above at all. Those are "complimentary" inflammation tests common in lyme and mold, fungal, yeast, other stuff too...