ACTIVE IMMUNIZATION AGAINST POLIOMYELITIS.
1. A single intracutaneous inoculation with a subinfective dose of the virus of poliomyelitis produces considerable immunity. 2. Virus-serum combinations produce an appreciable immunity, providing just sufficient serum is used to protect the animal from paralysis. If there is an excess of serum, the degree of immunity is considerably reduced.
Department of Bacteriology, McGill University, Montreal, Canada.
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