The active immunity offered by tetanus toxoid is effective in nearly -: (A) 25% of the patients, (B) 50% of the patients, (C) 75 % of the patients, (D) 100% of the patients
Answer is D. The aim of active immunisation with tetanus toxoid is to vaccinate the entire community and ensure a protective level of antitoxin approximately 0.01 IU/ml serum throughout life Reference; Park&;s Textbook of preventive and social medicine, 24th edition.Pg no. 330