Which depend are force and weak of our immunity?

 Here is very simple. As an all organs and systems of our organisms , immunity is strong,when is in enough energy quantity.  And immunity depends from a blood enough outflow to the tissues.If blood is not enough,thus immunity is low, and if blood is enough,thus immunity is high.

And blood is energy on the physical level.Where energy is having,thus a blood circulation is  enough, but  when energy is not enough, thus blood is not enough and immunity is low.And in disease we are loosing energy,and not when we are got infected. And all diseases as mass character are had on the war and other national disasters.And such bad habits as manage for peoples, resentments are lowering faster to our energy and immunity is lowering and we are attacking of cold,and arvd.

And take for every year arvd epidemy and leading in flu, a flu virus is constanty mutates, as within ten years ago are never displayed repeat for epidemies,causing a same virus stamp.