Actually, it's not that uncommon. For example, bubonic plague is endemic in the Usambara Mountains (Lushoto District) of Tanzania. I have visited the area... there were no travel advisories against doing so, at least in the mid 90s. A recent study of the sparsely populated area found that in the period 1986-2002, "there were 6249 cases of plague of which 5302 (84.8%) were bubonic, 391 (6.3%) septicaemic, and 438 (7.0%) pneumonic forms." Plague has been there for decades and illness from it is a seasonal phenomenon, like flu (although it's more deadly).
I mention this only because media seems to get stuck on a topic and ends up distorting reality - like making it seem that crime is rising, when it's actually falling; or clobbering us with every instance of abductions of pretty white girls, which are actually pretty rare.