Chronicle
The All-Ukrainian Bacteriological Institute is developing with successful results the question of protective vaccinations against typhus. A number of experiments performed on guinea pigs showed that guinea pig infected with typhus passerine virus and having suffered the disease is immune to subsequent infection with the blood of a typhus-typhoid patient. On the other hand, guinea pig infected with the blood of a typhoid patient and having survived the disease appears immune to infection with the guinea pig passage virus.
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