Doreen Virtue (born April 29, 1958) is an American author and a motivational speaker. She is the founder of Angel Therapy. Virtue has written over 50 books including oracle card oracle decks on the subject of angels and other spiritual topics.
Exogenous infection is caused by organisms not normally present in the body but which have gained entrance from the environment.. A small fragment of bacteria causes disease in humans,and many species colonize in the human body to create an ecosystem know as bacterial flora.
Many definitions exclude viruses and possible man-made non-organic life forms, as viruses are dependent on the biochemical machinery of a host cell for reproduction. A superorganism is an organism consisting of many individuals working together as a single functional or social unit. There has been controversy about the best way to define the organism and indeed about whether or not such a definition is necessary.