Psychologically:
Infection points in the dream normally not to an infection, but points out to the fact that one is influenced by others too strongly, in particular negatively. Then one should do research and try to avoid such influence.
(See also illness)
Lookup dream dictionary, dream symbols, dream meanings. The Online Guide To Dream Interpretation interpret your dreams, Infection dream dictionary analysis, Infection symbols, Infection meanings, dream encyclopedia, islamic dream interpretation, dream views Infection spiritual meanings of dreams.