NCIt definition : A betacoronavirus, first isolated in 2005, that utilizes 9-O-acetylated sialic acid
as a receptor determinant and has hemagglutinin-esterase activity. It is associated
with human respiratory infections, particularly the common cold, and febrile seizures.;
Alternative definition : CDISC: Any viral organism that can be assigned to the species Human coronavirus HKU1.;