Ive read and heard that SF medics are one of the most critical aspects to winning hearts and minds in ODA teams. My experience with EMT-B training so far is that although its not preferred you can quickly teach people what is needed to meet National requirements. Ive been considering purchasing some of the training equipment, when the paychecks come around, if I need to train like minded people in a SHTF scenario. Of course certain things wouldnt be avaliable like items that require a power source and certain medications. However other treatments will have to be substituted and improvised using herbal meds. Kinda like how Selco said he constantly used Rakia plants to treat wounds.
With a little preplanning and logistics you could have the ability to produce medical responders for your AO.