The protective titre of antitoxin to diphtheria following vaccination is
High-Yield Explanation
Active immunization by vaccination with diphtheria toxoid is the key in preventing diphtheria. . Serum antitoxin concentration of 0.01 IU/mL is usually accepted as the minimum protective level. 0.01 IU/mL is considered to provide basic protection and 0.1 IU/ml is considered to provide complete or total protection.