Tourism in the Era of Emerging Diseases

The US Department of Health and Human Services recently announced the US will begin compliance with a revised version of the International Health Regulations "designed to prevent and protect against the international spread of diseases while minimizing interference with world travel and trade." The original version, adopted in 1969 was design to combat the spread of cholera, yellow fever, smallpox and plague.
The new version is designed to tackle "new" health concerns, like smallpox, polio, SARS and human cases of new strains of human influenza, as well as potential biological, nuclear and chemical terrorist attacks. The DHHS press release goes on to say:

The regulations provide an algorithm to determine whether other incidents, including those of unknown causes or sources, may constitute public-health events of international concern, and as such must be reported to the WHO.

There's an algorithm for that?
On a related note... ever heard of Aircraft Disinsection? My spell checker hasn't.