In the 90s, I was in Marine Combat Training (MCT) Battalion at Camp Lejeune (There is another MCT Bn at Camp Pendleton.). MCT trains every new Marine for squad and platoon level tactics. So the new Marines spend weeks in the woods. Our training area is called the Verona Loop area. We typically had about 1000 Marines in the woods every day of the week.
In 1992, the Verona Loop area was #1 for tick borne diseases in America. I was the executive officer for the Bn and about 5% of our Marine caught some type of tick-borne disease. Rocky Spotted Mountain fever and Lyme's disease were just another day at sick call. We also had something called Human Ehrlichiosis. All three of these diseases are extremely serious if not caught in time. But luckily, all three are also easily treated if caught early (tetracycline for 14 days). Over a quarter of the regular staff (including me) caught one of those little bugs while I was there. It was so common, the tests were so expensive and the cure was so cheap (25 cents a pill- 4 pills a day for 14 days), that medical just did a quick look at the symptoms and gave us the pills. We all had extra pills, so if a student lost his pills, we would just hand him a few until the corpsman could get him a new ration.
Medical and preventive medicine caught a lot of heat from their chain of command for not stopping the out break. So in typical bureaucratic fashion, medical started labeling these cases "non-specific" infections and kept issuing out the pills. Accordingly, the out break "went away."