Alcohol-refined toxoids of diphtheria and tetanus were inoculated into 31 adults and 550 children.
These alum-precipitated toxoids are associated with many fewer and less severe reactions, both in adults and children, than those following the use of ordinary toxoids.
Within the limits of a year's observation after inoculation, such toxoids appear to be able to stimulate an adequate and durable immunity as adjudged by serial antitoxin titrations.
Submitted on April 19, 1948