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"KidsHealth." Polio. N.p., n.d. Web. 18 Nov. 2013.
Medical News Today. MediLexicon International, n.d. Web. 18 Nov. 2013."Polio and Prevention." Polio and Prevention. N.p., n.d. Web. 18 Nov. 2013.
"Polio Treatment." EMedTV: Health Information Brought To Life. N.p., n.d. Web. 19 Nov. 2013.