In immunology,<unk>  is the transition of leucocytes and other cell types involved in the immune system. On the other hand, deactivation is the transition in the reverse direction. This balance is tightly regulated, since a too small degree of<unk>  causes susceptibility to infections, while, on the other hand, a too large degree of<unk>  causes autoimmune diseases.
Immunologic activation
Immune tolerance
Tissue stress
Allergic inflammation
Immunogenic cell death
Infectious tolerance
Autoimmunity
Tumor progression