5 October 2020
		 |  Katherine Conroy 
 
		 
 
			   
		
		
			 
			Allergy is defined as an “abnormal immune reaction to an ordinarily harmless substance” [1], however the meaning of the word has taken many forms since its introduction in 1906 by Austrian Paediatrician and Immunologist, Clemens von Pirquet [2]. Combining his...