In 1993, cryptosporidium, a highly infectious and potentially deadly parasite, made its way into the water supply of Milwaukee. The contaminated water led to the largest and deadliest parasitic epidemic in US history, infecting over 400,000 people in the greater Milwaukee area and contributing to the death of at least 93 people. | For more Monsters Inside Me, visit http://animal.discovery.com/tv/monsters-inside-me/#mkcpgn=ytapl1
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