This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
The active immunity offered by tetanus toxoid is effective in nearly - 
Select and explain. 
A. 25% of the patients, B. 50% of the patients, C. 75 % of the patients, D. 100% of the patients
D: 100% of the patients
Answer: D: 100% of the patients 
Explanation: 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