For those who are adventuring in Eastern Africa and the Middle East traditional medicine and healers would be the vast majority of what the populace were using pre-war - given the medicine shortages by 2001 there native remedies would be highly in demand by both the civilians and the remaining militaries.
Good article to read for Kenya to give you an idea of how prevalent that kind of medicine is there and would probably be what characters would need to use in areas where there arent any US military medics available
"Over 70% of Kenyans rely on traditional healers as their primary source of health care. This number is high because healers respond to diverse needs – they work as herbalists, birth attendants and spiritualists and they’re within reach of ordinary citizens. Some estimates suggest that there is one healer for every 950 patients, compared with one doctor for every 33,000 in Kenya"
https://theconversation.com/kenyas-s...rom-won-102205