STUDIES ON THE IMMUNE RESPONSE OF THE RHEUMATIC SUBJECT AND ITS RELATIONSHIP TO ACTIVITY OF THE RHEUMATIC PROCESS. IV. CHARACTERISTICS OF STRAINS OF HEMOLYTIC STREPTOCOCCUS, EFFECTIVE AND NON-EFFECTIVE IN INITIATING RHEUMATIC ACTIVITY.

STUDIES ON THE IMMUNE RESPONSE OF THE RHEUMATIC SUBJECT AND ITS RELATIONSHIP TO ACTIVITY OF THE RHEUMATIC PROCESS. IV. CHARACTERISTICS OF STRAINS OF HEMOLYTIC STREPTOCOCCUS, EFFECTIVE AND NON-EFFECTIVE IN INITIATING RHEUMATIC ACTIVITY.