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 Muller surname is thought to have originated in Bavaria, Germany. As hereditary surnames began to be adopted in that area beginning in the 12th century, people were often identified by the kind of work they did. Muller is an occupational name for a miller, derived from the Old Germanic Mulinari.