UnseenEnemyisanessentialexplorationofreasons21st-centurypopulationsareexperiencingarashofdiseasesthatwereonceonlyoutbreaks\,buthavenowbecomefull-blownepidemics.Thisincreasedriskthatweface\,andthewayssocietyandindividualscanworktogethertoreducethatrisk\,areexplainedtothepublicthroughthecasestudiesofthreeepidemics:Ebola\,infl...