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Unseen Enemy is an essential exploration of reasons 21st-century populations are experiencing a rash of diseases that were once only outbreaks, but have now become full-blown epidemics. This increased risk that we face, and the ways society and individuals can work together to reduce that risk, are explained to the public through the case studies of three epidemics: Ebola, infl...。Follows a straight-laced high school student and her slacker best friend who, after a regrettable first sexual encounter, have 24 hours to hunt down a Plan B pill in America's heartland.。