1/ The virus or viruses are part of the communication mechanisms between cells, they contain genetic material in a protein capsule and they have receptors on top that bind to the following cells. Cells produce it, especially dying cells, to alarm other cells that there is high 2/ toxicity in the environment and so that they all enter a state of conservation of life, therefore a person in that state will enter that mode and that removes all the energy from the body creating discomfort. So a cell that receives a toxic signal for whatever reason triggers