<prompt> Threshold level of herd immunity for Peussis is?80709050  <response>: Ans. is c i.e., 90 Herd immunity It is the level of resistance of a community or group of people to a paicular disease. It occurs when the vaccination of a poion of the population or herd provides protection to unprotected non? vaccinated individuals. Advantage of herd immunity It is not necessary to achieve 100 immunization to control a disease by providing herd immunity. When a ceain percentage of population, is vaccinated, the spread of disease is effectively stopped. This critical percentage is referred to as herd immunity threshold. Disease Herd immunity threshod Diphtheria - 85 Measles - 83-94 Mumps - 75-86 Peussis - 92-94 Polio - 80-86 Rubella - 80-85 Small pox - 83-85 