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 surname Olinger was first found in Kent where Robert St. Leger was granted estates at Ulcombe and became Lord of the Manor of Ulcombe. Ulcombe Place and manor belonged to the family of St. Leger, of whom Sir Robert, of an ancient house in Normandy, is said to have supported the Conqueror with his hand when landing on the Sussex coast.