Question

In animals engineered to lack an innate immune system, their adaptive arm can't contain an infection. Why not?

Answer 1

Innate immunity Is something already present in the body ..i.e physical barriers and nk cells i.e natural killer cells .Adaptive immunity refers to antigen specific immune response.and is created in response to exposure to a foreign substance once activated against a specific type of antigen.the immunity remains throughout the life.Adaptive immune system is composed of B cells and T cells.

It does this posting two types of changes on the phagocyte surface that activate the adaptive immune system.this alerts the adaptive immune system and allows cells know as T cells to recognise an infected cell.

This part of immune system is activated when the innate immune response is insufficient to control an infection..A combination of dendritic cells link the innate and adaptive immune responses.