Plague

"By 1910, plague had circled the globe and established itself in rodent populations on all inhabited continents other than Australia. After 1920, however, the spread of plague was largely halted by international regulations that mandated control of rats in harbors and inspection and rat-proofing of ships. Before the third pandemic subsided, it resulted in an estimated 26 million plague cases and more than 12 million deaths, the vast majority in India. By 1950, plague outbreaks around the world had become isolated, sporadic, and manageable with modern techniques of surveillance, flea and rat control, and antimicrobial treatment of patients. From 1969 through 1993, a median of 1356 human plague cases were reported annually to the World Health Organization, with around 10 to 15 countries reporting cases each year. Plague has practically disappeared from cities and now occurs mostly in rural and semirural areas, where it is maintained in wild rodents. In the United States, the last outbreak of urban plague occurred in Los Angeles in 1924 and 1925, and human cases since then have resulted from zoonotic exposures in rural areas of western states."
"Plague, because of its pandemic history, remains one of three quarantinable diseases subject to international health regulations (the other two being cholera and yellow fever). The alarm that plague is still able to evoke was highlighted by the public panic over and exaggerated international response to reports of outbreaks of bubonic and pneumonic plague in India in 1994."

Reference: History of Plague [Online] Accessed at: http://www.manbir-online.com/diseases/plagur-history.htm [Accessed on 6th March 20011)