Infections with viruses of the genus RUBULAVIRUS, family PARAMYXOVIRIDAE.

A genus of the family PARAMYXOVIRIDAE (subfamily PARAMYXOVIRINAE) where all the species have hemagglutinin and neuraminidase activities but lack a C protein. MUMPS VIRUS is the type species.

A species of RUBULAVIRUS associated particularly with acute laryngotracheitis (CROUP) in children aged 6 months to 3 years.