Herd immunity provides protection to-
Herd immunity describes a type of immunity that occurs when the vaccination of a poion of the population provides protection to unprotected individuals provides an immunological barrier to the spread of disease in human herd elements-(a) occurence of clinical and sub clinical infection in the herd ( b ) immunization of the herd ( c) herd structure (refer pgno:102 park 23 rd edition).
Immunized persons
Non immunized persons
Both
None
Epidemiology