Abstract
Summary
Persons belonging to blood-group A and those belonging to blood-group O formed protective antibody equally well following ingestion of type 1 pneumococcal vaccine. A somewhat greater percentage of persons in group B responded than in groups O and A but the number of individuals was too small to justify relating the fact to membership in the group.
The author wishes to express his thanks to Dr. Ralph S. Mucken-fuss, Director of the Bureau of Laboratories of the Department of Health, for providing the facilities which made it possible to carry out these experiments.
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