Experiments on immunization against typhus with a guinea pig brain virus subjected to various treatments

Abstract

Aa., citing the extensive literature available on the subject, indicate that the brain was usually injected in the amount of 0.1-0.3, giving equivalent results: either the pathogen was killed by this method of brain processing and no immunity was achieved, or the virus could not be killed and then a typical infection occurred, which naturally communicated immunity to the animal.

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