Disease elimination is helped by-: (A) Herd immunity, (B) Isolation, (C) Quarantine, (D) None
Answer is A. Ans. is 'a' i.e., Herd immunity o If the herd immunity is sufficiently high, the occurrence of an epidemic is regarded as highly unlikely.o If that high level of immunity is maintained and stepped up, by an on-going immunization programme, to the point where the susceptible persons are reduced to a small proportion of the population, it may lead to elimination of the disease in due course.o This has been achieved in such diseases as diphtheria and polio.