Most infections are endemic, but sharp small epidemics occasionally occur with types 1 and 2. Parainfluenza virus infections are primarily childhood diseases, the highest age-specific attack rates for croup occur in children below the age of 3 years.
Olinger is an ancient Norman name that arrived in England after the Norman Conquest of 1066. The name Olinger comes from the name of the famous St. Leger.
The word 'Elder' comes from the Anglo-Saxon word aeld. In Anglo-Saxon days we find the tree called Eldrun, which becomes Hyldor and Hyllantree in the fourteenth century. One of its names in modern German - Hollunder - is clearly derived from the same origin. In Low-Saxon, the name appears as Ellhorn.