Typical response of animal tissues to potentially damaging stimuli e.g. by physical stimuli (pressure), chemical stimuli (heat or cold), or by micro-organisms (viruses, bacteria), with the function to remove this stimulus and to prevent its spread. Some technical nanoparticles are suspected to cause inflammations because of their bacteria- and virus-like particle shape, e.g. by inhalation of very high Titaniumdioxid concentrations in the lung.