> Actually, it is immunity. 

The word immune came before medicine, in this sense: 
Latin immūnis exempt from tribute or taxation, exempt from duties or obligations, free. 
"Provincials were free and immune without appealing to the See of Rome (1653)."

In the medical sense it appears in 1866: 
Protected from or resistant to some noxious agent or process.
"Mr. Lee then goes on to say that the skin will in time become immune to other irritants as well."

Later, it becomes "attributive:"
Of or relating to the phenomena of and processes involved in immunity.

"His observations show that the body specially developed in the blood of the animal treated—the ‘immune-body’, enters into firm combination with the red corpuscles (1899)."
"Very occasionally, urticaria is the first manifestation of an underlying immune disorder (2004)."

urticaria = a rash of round, red welts on the skin that itch intensely, sometimes with dangerous swelling. Also called nettlerash or hives. (Urtica = nettles).

> caused by the release of histamine and other mediators of inflammation (cytokines) from cells in the skin. This process can be the result of an allergic or nonallergic reaction, differing in the eliciting mechanism of histamine release.

&c.

             ***********************************************
The BEE-L mailing list is powered by L-Soft's renowned
LISTSERV(R) list management software.  For more information, go to:
http://www.lsoft.com/LISTSERV-powered.html