The term 'immunity' refers to
Mutualism between host and parasite
Ability of the host to fight and disease causing organisms
Ability of the parasite to survive within a host
A fatal disease
Human immune system -
The human immune system consists of lymphoid organs, tissues, cells and soluble molecules like antibodies.
- wherein
The immune system plays an important role in allergic reactions, auto-immune diseases and organ transplantation.