Naturally Immunity -
'Natural immunity' of an animal is also known as innate immunity, native immunity or inherited immunity. This relates to a general or non specific type of resistance which prevents infection by different kinds of pathogens. The extent of this natural immunity differs in different organisms.

For example, man can easily get mumps while cats and dogs are immune to this disease. This level of natural immunity may vary not only between species but also between races or strains, and sexes. This may also be controlled by nutrition, hormones and many other factors.