<prompt> Disease elimination is helped byHerd immunityIsolationQuarantineNone  <response>: If herd immunity is sufficiently high and its level is maintained and stepped up by an ongoing immunization programme to the point where the susceptible persons are reduced to a small propoion of population it may lead to the elimination of disease in due course. Ref: 25th edition, Parks Textbook of Preventive and Social Medicine, Page no. 111 