Credits to...
http://en.wikipedia.org/wiki/Immunodeficiency
http://en.wikipedia.org/wiki/1993_Milwaukee_Cryptosporidiosis_outbreak
http://en.wikipedia.org/wiki/Cryptosporidiosis
http://www.stanford.edu/class/humbio103/ParaSites2001/crypto/index.html
http://www.youtube.com/watch?v=bcCcXWbGuOI
http://www.visualphotos.com/image/1x5062387/cryptosporidium_sp_in_large_intestine
http://www.cdc.gov/healthywater/emergency/
http://en.wikipedia.org/wiki/1993_Milwaukee_Cryptosporidiosis_outbreak
http://en.wikipedia.org/wiki/Cryptosporidiosis
http://www.stanford.edu/class/humbio103/ParaSites2001/crypto/index.html
http://www.youtube.com/watch?v=bcCcXWbGuOI
http://www.visualphotos.com/image/1x5062387/cryptosporidium_sp_in_large_intestine
http://www.cdc.gov/healthywater/emergency/