The cells, known as T-regulatory cells type 1 (Tr1), are thought to turn off unnecessary immune reactions and to block the action of immune cells that otherwise would attack the body and cause dangerous inflammation.
lymphocyte
stem cell
it is magic
HIV attacks Acquired Immune system.
CD4 T cells are a type of white blood or immune cell. Elevated levels suggest an immune response is underway. Most likely this is due to a mild infection but could also indicate autoimmunity (immune reaction against yourself).
Type of white blood cell, part of the immune system.
Rusting? Oxidation reaction? Chemical reaction
Only if the person is already allergic to that antigen. Not if they are immune to the antigen. The word antigen refers to the protein that joins with the antibody. If the antibody is of the allergic type (IgE) then an allergic reaction will happen and if the antibody is of the immune type (IgG, IgM or IgA) then there won't be an allergic reaction.
micoglia
Helper T cells
That is the correct spelling of "neutrophil", a type of cell in the human immune system.
Acquired immunity (also known as adaptive immunity) This immune reaction is quite fast due to the immune memory.