Abstract
DURING the last two decades increasing interest has been taken in the problems of hepatitis. Many attempts have been made to adapt hepatitis virus to different laboratory animals, but so far no suitable species has been found, nor have the efforts to devise methods for cultivation of hepatitis virus in tissue culture or immunologic tests been successful although interesting results have been reported.1 2 3 3a Therefore, much current knowledge is based on information obtained from studies on volunteers4 5 6 7 8 or in institutional outbreaks.9 10 11 Viral hepatitis is usually divided into infectious hepatitis caused by virus A and serum hepatitis caused by virus B. Although . . .
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