The fact that a half-a-million people die each year from filariasis, Guinea worm, and onchocerciasis elicits little more than a yawn. But diseases like Ebola and swine flu had us riveted: horrific pathogens from the primordial African or Asian muck could migrate to infect the innocent Western world. Sounds like a thriller movie. Which it was. Outbreak, in 1995, grossed more money than the budget for most health departments. More