Medicine: Most Wanted Virus

Few diseases are more mysterious than viral hepatitis—a liver inflammation for which there is no known cure, caused by at least two elusive viruses that no scientist has ever seen. Operating under a dozen aliases (e.g., bilious attack, acute yellow atrophy), hepatitis has occasionally been confused with such unrelated ailments as malaria and mononucleosis, was once believed to be a penalty for excessive drinking. During World War II hepatitis was epidemic in the armed forces of the major combatants as well as in many civilian populations, and more than 170,000 cases were reported...

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