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Browsing 1907 Report of the Government Veterinary Bacteriologist of the Transvaal 1907 - 1908 by Type "Text"
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Theiler, Arnold, Sir, 1867-1936; Transvaal Department of Agriculture
(Pretoria: Government Printer and Stationery Office, 1909)
Resume:
The experiments prove that a virus may become inert in practice; this avirulency is due to some foreign matter, inasmuch as inert virus added to virulent sterile virus promptly produces avirulency. It is probable ...