Innate Immunity

It will depend on our capacity to regulate the two immune system components—innate immunity, as was discussed above, and adaptive immunity—whether we can manipulate immune function by augmenting it or reducing it.

The innate immune system serves as the body's initial line of defence.
The body's innate immune system is the first to notice foreign invaders such viruses, germs, parasites, and poisons, as well as injuries or trauma. The innate immune response, which is the body's initial line of defence, stimulates cells to fight and eliminate these agents or events or to start the healing process. It also informs and modifies the adaptive immune response, which comes next.

Adaptive immunity: the second, focused reaction
The second and most focused line of defence is made up of adaptive immune cells, The innate immune system triggers their response. After identifying the intruder, the cells can grow and fight it, resulting in disease healing and defence against its recurrence.