a study of the rise and fall in circulating tetanus antitoxin in a group of 15 adults after basic and booster immunization indicates that although individuals vary greatly in their responsiveness to toxoid , the falloff in antitoxin appears to be fractionally constant for each individual , and over periods of 5 to 6 years appears to be the same after successive doses .
C0039615
tetanus antitoxin
C0003445
antitoxin