[ArmySGT.]

I don't think anyone of them would be skilled enough that a pre-War person would call them Doctor.

Without formal schooling, that some things would not be passed along because these can't be done without a laboratory.

Say a 25% loss in knowledge per generation.

Not to say an Emdee doesn't have a valuable skill set. Probably exceptional at trauma care and patient care. Diagnosis though, not so much. Cultures can't be sent to a lab, and medicines brought from the pharmacy.

An Emdee can remove a bullet in a relatively minor wound, surely. A critical wound with lots of internal bleeding, no.

An Emdee can probably get away with some minor surgeries because this person is aware of the need for a sterile wound. So probably an appendix. As long as ether and isopropyl alcohol are available.

An Emdee could set and if available even plaster a simple fracture. A compound fracture or shattered limb means amputation. Without X-rays or the formal training to read one if it was available.

An Emdee has probably become a fine herbalist, and in some cases a very limited chemist (distillation or emulsion). So while whatever it is may help you, atleast it won't kill you.

Then it also depends on how literate that Emdee is.......... To what level can that person read? Can you give them a text and expect them to absorb much?

A travelling Emdee is probably very limited (immediate trauma care) while one in a village or small town has better resources and improvised equipment.