<prompt> The active immunity offered by tetanus toxoid is effective in nearly -25 of the patients50 of the patients75 of the patients100 of the patients  <response>: The aim of active immunisation with tetanus toxoid is to vaccinate the entire community and ensure a protective level of antitoxin approximately 0.01 IUml serum throughout life Reference; Park;s Textbook of preventive and social medicine, 24th edition.Pg no. 330 