http://www.merck.com/!!s9OfD17kBs9OwL2Wwl/disease/preventable/hepb/ Brief facts on hepatitis B: symptoms, statistics, spread, and prevention.

http://www-medlib.med.utah.edu/WebPath/INFEHTML/INFEC041.html This site illustrates photomicrographs of blood parasites and has links to other image-containing sites.

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