Association of Type 2 Hemadsorption (Parainfluenza 1) Virus and Asian Influenza a Virus with Infectious Croup

Abstract
CROUP is one of the most dramatic, frightening dangerous syndromes in pediatrics. In some cases when treatment is not available, death results.In the fall of 1957 a study to isolate new viruses and to associate these agents with clinical illness, including croup, was initiated by the Virus Section, Research Foundation of the Children's Hospital of the District of Columbia, and the Laboratory of Infectious Diseases, National Institutes of Health. The patients were separated into two major categories in the study: those with severe respiratory-tract illness requiring hospitalization; and those with mild respiratory-tract illness seen in the Out Patient Department. . . .